Pollution Tax For
Controlling Emissions From The Manufacturing And Power
Generation Sectors: Metro
Manila
by Catherine
Frances J. Corpuz
* The researcher
appreciates the support of the EEPSEA, particularly Dr. David
Glover and Dr. Herminia Francisco. The paper likewise
benefited from the comments and advice of Dr. David James.
"The choking smoke that shrouds
Manila, the
capital of the Philippines has increased its 11 million
residents' chances of developing lung cancer by up to 15%."
- Kate Noble, Health Report, Time,
February 9, 1998
1. INTRODUCTION
Dasgupta and Maler (1991) ruefully
observed: "The fact that for such a long while environmental
and development economics have had little to say to each other
is a reflection of these academic disciplines; it does not at
all reflect the world as we should know it." Fortunately for
us, environmental concerns are now in the forefront of
discussions on economic growth. While the manifestations of
environmental abuse would differ depending on the conditions
of each country, they are generally of two kinds: (i) those
that arise primarily because of poverty and population growth;
and, (ii) those that arise from increased industrialization
and urbanization leading to the pollution of water, air and
soil. The latter is the subject of the current endeavor.
In the course of producing (and
consuming) commodities, negative or beneficial side effects
arise that are borne by the economic agents not directly
involved in the production or consumption of the commodities.
Broadly defined, an externality is a relevant cost or benefit
that individual economic agents fail to consider when making
rational decisions. Externalities drive a wedge between
private and social costs or benefits and therefore, prevent
the attainment of economic efficiency and Pareto efficiency.
However, the collective effect of ignoring externalities is
socially undesirable. Without any corrective action taken to
internalize externalities, resources will not be allocated
efficiently, even if the economy is otherwise competitive.
Externalities may be internalized by government intervention
through different avenues: i) Pigovian taxes or subsidies; ii)
through voluntary agreements between individuals involved
(e.g., tradable emission permits); and, iii) control of
quantities of polluting inputs or outputs that would otherwise
prevail in an unregulated market.
Historically, environmental policies
rely heavily on regulations. The approach has not solved the
environmental problems (and some even contend that they have
exacerbated the situation). Out of the economists’ tool-kit
comes the standard prescription of using market-based policies
to arrive at the least cost solutions to environmental
problems.
Section one of this paper looks at
the damage wrought by industrialization in Metro Manila’s air
quality and how economic instruments can be utilized to curb
the problem. In particular, it aims to come up with estimates
of emission loads, abatement costs and appropriate emissions
tax for selected industries within the manufacturing and power
generation sectors.
Section two provides some background
information on the study area, the pollution situation and the
prevailing rules governing environmental protection. Section
three explains why economic instruments such as a pollution
tax may be a more effective means of regulating emissions from
the industries. The conceptual framework is set forth in the
fourth section while the estimates are contained in section
five.
2. THE SCENE
2.1 Profile of Metro Manila
Metropolitan Manila, otherwise known
as the National Capital Region (NCR) currently consists of
nine cities and eight municipalities (See Figure 1). The
cities are Manila, Kalookan, Quezon, Pasay, Mandaluyong,
Makati, Pasig, Muntinlupa and Parañaque.
The latter five are newly created cities. It is home to over
eight million people and plays host to about 69% of the
country’s 19,000 industrial firms -- all this in its 636
square kilometers of land (NSO, 1994).
The spatial concentration of
industrial activity and population in highly urbanized areas
generate pollution. These industrial activities increase the
adverse effects of pollution in the socio-economic development
of these areas. Metro Manila, as the country’s center of
business and economic activities, is overcrowded with people
and factories grossly exceeding nature’s assimilative
capabilities and affecting the health and welfare of millions
of people (Cruz and Repetto, 1992). Needless to say, the
economic cost of air and water pollution, and solid waste
accumulation is rising.
Environmental assessments show an
increasing trend in air pollution since the mid-70s. Commuters
are regularly exposed to high concentrations of 1,000 mg/cubic
meter of respirable suspended particulates (DENR, 1989).
Eleven monitoring stations around Metro Manila have registered
a growing level of total suspended particulate matter (PM) in
the air throughout the years.
It is also expected that as economic
activity increases in the Asia-Pacific region, notably
highlighted by a huge influx of migration both within and
outside the country, there will be an added pressure on
resources. Pollution standards and regulations will be harder
to meet, monitor and enforce. Increased energy use is expected
as the Philippines tries to catch-up with its contemporaries
in the region. Equally disturbing is the fact that as
environmental laws overseas become more stringent, there is a
tendency for "dirty" industries from developed economies to
migrate to Third World countries in the form of foreign
investments.
Figure 1. Map of Metro Manila
2.2 State of Environmental
Regulation
While the country’s policymakers
have long since recognized the need for strengthened
environmental and resource conservation efforts, they tended
to focus on the latter. It is only during the 1990s that
several environmental problems in the Philippines have taken
center stage. Among these, the reduction of emissions was
diagnosed to be in the highest priority.
Prior to the Clean Air Act of 1999,
the National Pollution Control Decree of 1976 (PD 894) as
amended by Executive Order 192 of 1987, was the main
legislation dealing with air and water pollution. It sets the
tone on the administrative and regulatory mechanism for
pollution control. It was operationalized through the
imposition of regulatory requirements prior to, during and
after the actual operation of an industrial firm.
Air quality standards have also been
set for the major pollutants. As per DENR Administrative Order
No. 14 dated March 1993, the Philippines has revised its own
ambient air quality standard for pollutants (Table 1).
Emission standards for stationary sources, which vary across
sectors, dates when the establishments were put up and types
of pollutant, are also shown in Tables 2 and 3. Three
standards also set the maximum allowable sulfur content in
fossil fuels effective January 1996. Prior to that, the sulfur
content of fuels used were much higher (Table 4).
Before a firm can build a plant and
operate, it has to obtain the following from the DENR: (1) an
Environmental Compliance Certificate (ECC); (2) Authority to
Construct (AC); and (3) a Permit to Operate. Aside from the
necessary environmental permits prior to operation, firms are
likewise subjected to periodic inspections. This shows that we
do not lack the basic rules governing pollution control. What
is sorely lacking is a workable incentive scheme owing to
asymmetric information. The problem can easily be set in terms
of prisoners' dilemma wherein the government (principal) could
opt to inspect or not while the firms (agents) could comply
with the standards or not. Ideally, we should have a situation
where even without constant monitoring, the firms should
actually comply with the standards. However, that set – is far
from reality.
To sum, the Pollution Control Law
and the DENR Administrative Orders provide the air and water
quality regulations, standards for critical pollutants, and
guidelines pertaining to prohibitive acts and penalties for
violation. There are neither prescribed performance nor
technology standards. The firms, therefore, are free to choose
the technology and pollution control measures for as long as
they meet the emission standards. However, these laws do not
provide a specific environmental tax system or a policy mix to
effectively curtail air quality degradation. Worst, the
Philippines seemingly lacks strong political mandate in
meeting the air quality standards as evidenced by the delays
in legislating the Clean Air Act.
Table 1. Philippine ambient air
quality standards (in
m g/m3, unless
otherwise stated)
Pollutant |
1 hour |
24 hour |
1 year |
PM |
300 |
230 |
90 |
PM10 |
200 |
150 |
60 |
SO2 |
340 |
180 |
80 |
CO |
35 m
g |
10 m
g (8
hr) |
6 m
g |
NO2 |
400* |
150 |
100** |
Lead |
|
1.5 (3 months) |
1.0 |
Source: DENR
Note: *WHO standards; **U.S. standards
Table 2. Maximum emission limits
for particulates in stationary sources (in
mg/m3)
|
New Source
1993-onwards |
Existing Source
After 1978 |
Existing Source
Before 1978 |
Fuel burning
steam generators
-
Urban or industrial
areas
-
Other areas
|
150
200 |
300
300 |
500
500 |
Incinerators |
200 |
300 |
500 |
Cement
plants (Kilns, etc) |
150 |
300 |
--- |
Smelting
furnaces |
150 |
300 |
500 |
Other
stationary sources |
200 |
300 |
500 |
Source: EMB-DENR
Notes:
-
For existing sources, the applicable date
classification in columns 3 and 4 refers to the initial
plant construction or modification, whichever is
appropriate
-
For fuel-burning steam generators or sources, the
concentration of particulate matter at the point of
emission shall be corrected on the basis of 12% CO2
by volume
-
For the purposes of this table, the following
definitions apply:
-
"Other Stationary Sources" means a trade,
process, industrial plant or fuel burning equipment
other than thermal power plants, industrial boilers,
cement plants, incinerators and smelting furnaces
-
"Urban Area" means a poblacion or central
district area of cities or municipalities having at
least 50,000 population, or twin political subdivisions
with contagious boundary which essentially form one
community whose population is more than 50,000
inhabitants. Inside these centers of population are some
scattered industrial establishments
Table 3. Maximum permissible emissions for sulfur oxides in
stationary sources
|
Existing Sources |
New Sources |
Manufacture
of sulfuric acid and sulf(on)ation process |
2.0 gm/ m3 as SO3 |
1.5 gm/ m3 as SO3 |
Fuel burning
steam generators
-
January 1, 1994
-
January 1, 1998
|
1.5 gm/ m3 as SO2
---
--- |
1.0 gm/ m3 as SO2
0.7 gm/ m3
as SO2 |
Other
Stationary Sources |
1.0 gm/ m3 as SO3 |
0.2 gm/ m3 as SO3 |
Source: EMB-DENR
Table 4. Sulfur contents in
fossil fuel, existing sources
Fuel |
Max S (% by weight) |
|
July 1993 |
January 1996 |
Fuel oil
(all grades) |
3.5 |
3.0 |
Industrial
diesel |
0.7 |
0.5 |
Coal |
2.5 |
1.0 |
In 1997, the Industrial Ecowatch
Project, a public disclosure program was introduced in the
NCR. This falls in the third type of pollution control
instrument that O’Connor (1996) refers to as suasive
instruments (SI). The Ecowatch is patterned after the
Proper/Prokasih project in Indonesia, which relies on a rating
and disclosure scheme to control water pollution. It initially
covered some 1,000 companies involved in beverages, food
manufacturing, textile, chemical manufacturing, pulp and
paper, pharmaceuticals and other consumer products. U.S.
consultants, together with DENR personnel who conducted
inspections, later reduced the list to 88 industrial firms
whose initial rating was disclosed to them individually and
confidentially. These companies were then given six months to
improve their ratings. During the disclosure ceremonies last
November 1998, it was reported that 26 companies have already
received a "blue" rating, which means that they have
sufficiently complied with the applicable environmental
regulations; 9 were rated "red" and 10 were rated "black".
Companies complying with the
requirements and standards of the DENR are expected to receive
a "green" rating if they remain in compliance for two
consecutive years. They will be eligible for "gold", the
highest rating, if they remain "green" for another two years.
A rate of "red" is given when a firm’s control measures are
not enough to meet the standards and the lowest rating,
"black" is reserved for those who make no effort to comply.
The initial success of the project convinced the department to
adopt it as a new compliance monitoring system. At the moment,
it only covers BOD effluent although it may later include air
emissions.
The use of market-based instruments
(MBIs) for environmental protection is at its infancy. The
Department of Finance has reported that in 1997, the major
sources of tax revenues are the corporate income (17.33%),
import duties (11.86%), excise taxes (13.34%), individual
income (11.54%) and the value-added tax or VAT (10%). While
these traditional taxes are sometimes viewed as disincentives
to economic activities, environmental taxes provide incentives
to productive activities and to minimal distortions in the
market. These environmental taxes include rent charges, energy
tax, and charges on emissions and effluents. Tax revenues from
fuels & oils, mining and forest charges account for only
6.19%, 0.016% and 0.024%, respectively.
As a risk-liability component of the
Environmental Impact Assessment System, the Environmental
Guarantee Fund is a "fund that proponents, required or opting
to submit an EIS, shall commit to establish, when an
Environmental Compliance Certificate (ECC) is issued for
projects and undertakings determined by the DENR to pose
significant risk to answer for damage to life, health,
property and the environment caused by such risk, or requiring
rehabilitation or restoration measures." The EGF is an
established financial arrangement between the DENR and the
firm. It is intended to assure that the firm is fulfilling its
commitments to environmental
protection and rehabilitation.
Ideally, the bond should equate the potential value of
environmental damage from the firm’s operations and the cost
of eventual clean-up of the damage.
Only recently, an environmental
user’s fee to protect the Laguna Lake was established. It is
composed of a fixed fee and a variable fee. The fixed fee is
expected to cover the administrative cost of implementing the
system while the variable fee depends on the volume and
concentration of the wastewater discharge. All parties that
discharge wastewater into the lake are affected. However,
since the system for collecting from households is still being
developed, the first phase applies only to industrial
establishments.
2.3 Power Generation and the
Industrial Sectors
It is widely documented that the
Philippines, like most developing countries, has opted to push
for its industrial sector (particularly, manufacturing) as its
primary agent of growth. The following macroeconomic
incentives previously only promoted and encouraged producers
to use technology intensive intermediate inputs: (1) The
fiscal and trade policies that favored importation of
intermediate input notably energy intensive technology. These
forms of investment highly favor capital; (2)
Import-substitution program that raised the prices of finished
goods but kept intermediate inputs inexpensive; and (3)
Foreign-trade related incentive structure. As production level
expands and the use of intermediate inputs become limitless,
the industrial waste stream grew rapidly due to greater
discharge of residuals, more energy use, and more
post-consumer waste (Cruz and Repetto 1992).
Industry, as the relatively advanced
sector of the economy is often targeted as the main culprit in
the deterioration of air and water quality. Taking into
account the recent trade, investment and industrial policy
reforms, it appears that the sector is set for more rapid
growth. An emerging problem, however, is that despite efforts
to deconcentrate industry from Metro Manila, most
manufacturing firms remain there. This concentration of
activity rather than the rapid growth of the manufacturing
sector has led to increasing concern about the impacts of
industrial pollutants (World Bank, 1993). Also, we must
realize that efforts towards improving industrial efficiency
will only reduce pollution from industrial sources.
The power generation sector produces
an environmentally benign final product: electricity. On the
other hand, it emits pollutants (notably SOX) in
the process of generating electricity. Munasinghe (1995)
mentioned that the energy sector contributes 49% of greenhouse
gases and electricity generation alone produces over 25% of
energy related carbon dioxide emissions. Power generation in
the Philippines is basically government-run and has suffered
from inefficiencies. Financial difficulties experienced by the
National Power Corporation caused delays in their new
investments and rehabilitation projects. This resulted in the
infamous power outages during the early 1990s. Most of its
oil-fired plants, which include those in Metro Manila, are
over 30 years old and will have to be retired. The Sucat power
plant will be closed for rehabilitation. But while the
existing facilities are still operational, we have to contend
with their higher pollution intensities per unit of power
generated.
Tables 5 and 6 show the estimates of
the distribution of emissions from different sources in Metro
Manila in 1990. Admittedly, the share of stationary sources
pale in comparison to those coming from households and
vehicles. Pollution problems accorded high policy priority are
said to be those where abatement would result in significant
benefits and can be achieved at relatively low cost. Such is
the case for particulates, especially those coming from
stationary sources. However, since pollution abatement does
not cater exclusively to a single pollutant, it is natural to
include other pollutants like sulfur and nitrogen oxides in
the study. The available, albeit limited, data and the pivotal
role of the industries in economic endeavors make these
sectors the consequent subject of research.
Table 5. Summary of emissions
from all sources in Metro Manila, 1990
Source Category |
Pollutants (tons per year) |
TOG |
CO |
NOx |
SOx |
PM |
PM10 |
Mobile |
100,954 |
572,626 |
66,216 |
10,350 |
13,220 |
11,450 |
Stationary |
1,816 |
4,046 |
13,418 |
78,094 |
9,323 |
7,494 |
Area |
5,162 |
525 |
276 |
12 |
102,386 |
51,042 |
TOTAL |
107,932 |
577,197 |
79,910 |
88,456 |
124,929 |
69,986 |
Source: Ayala, 1993
Table 6. Contributions to air
pollution in Metro Manila, 1990 (tons/year)
Pollutant |
Transport |
Industry |
Energy Generation |
Total |
SOx |
15,900*
(15.9%) |
8,818
(7.8%) |
79,805
(76.9%) |
103,923
(100%) |
PM |
12,100
(63.1%) |
1,449
(7.6%) |
5,636
(29.4%) |
19,185
(100%) |
Pb |
72
(100%) |
|
|
72
(100%) |
NOX |
73,000
(86.7%) |
1,867
(2.2%) |
9,299
(11.0%) |
84,166
(100%) |
CO |
537,000
(99.4%) |
2,502
(0.5%) |
845
(0.2%) |
540,347
(100%) |
HC |
89,100
(99.7%) |
195
(0.2%) |
42
(<0.1%) |
89,337
(100%) |
Source: World Bank (1993), based on 1992
LLDA survey
Note: SOX for transport is based on extrapolation
of 1987 EMB estimate of 11,900 (tons/year) increase in diesel
used.
3.0 CONCEPTUAL FRAMEWORK
Environmental regulation and
assessment in countries like the Philippines is a tedious but
necessary process. There are many limitations to evaluating
environmental conditions and implementing policies that
improve them. Weak institutional capacity, high monitoring and
administrative costs for individual programs and limited (or
even non-existent) engineering information hinder the
activity.
Direct regulation methods that the
Philippines has adopted as its major policy instrument include
concentration-based regulation that set the upper limit of
effluent/emission regulations. Direct regulation can control
the discharge of a target pollutant within a relatively short
period of time, but it can provide industry no incentives to
make greater efforts for pollution control beyond the level
required by law. Likewise, they are often hampered by
difficulties in enforcement and high administrative costs.
These measures fall under the category of command-and-control
instruments (CACs). In contrast, MBIs, otherwise known as
economic instruments (EIs) work through market forces to
combine economic and environmental decision making. Market
signals, like prices, are utilized to influence the behavior
of players to coincide with environmental goals set by
society.
An important branch of the MBI
family is environmental tax. If the regulating body imposes
taxes on environmentally detrimental activities equal to the
damages they cause, polluters will be forced to account for
these damages in their production and consumption decisions.
In effect, when the externalities are internalized, the
appropriate levels of pollution control and emissions will
result. OECD (1996) lists the various environmental tax
instruments as follows:
-
Product
charges or taxes – A product tax is levied on the
units of harmful substances contained in products. The
taxation is linked to the product itself or part of its
contents that are detrimental to the environment. Product
charges may be applied to raw materials, intermediate, or
final (consumer) products. They can be a substitute for
emission taxes when direct measurement of emissions is not
possible.
-
Tax relief
– These consist of provisions in income tax systems
designed to encourage some kind of behavior either by
consumers or producers. The most common form of tax relief
is accelerated depreciation, but many countries also
provide investment tax credits for certain types of
investment such as pollution control equipment.
A number of studies showed the
advantages of using MBIs to complement existing
command-and-control policies. The newfound popularity of
economic incentives is bolstered by the view that they
potentially offer some added efficiency and cost savings in
achieving the country’s environmental objectives. Figure 2
illustrates the use of a least cost marginal cost curve
represented by the envelope from the marginal cost schedules
for different available technologies. The least cost placement
of technologies is achieved by exhausting all lower cost
efforts, across all technologies, before moving on to the
higher cost ones.
Figure 2. Least cost envelope of
abatement strategies
Total emission control costs can be
reduced relative to the CAC outcome by encouraging the lower
cost source to control more and allowing the higher cost
source to control less. This is shown in Figure 3.
The diagram indicates that the total
cost of abatement is minimized by the distribution of effort
between the two firms where MAC A = MAC B.
A corrective tax will enable the higher cost source to
increase its emissions by paying taxes instead of paying for
the more expensive control costs. At the same time, the lower
cost source has the incentive to further reduce its emissions
to avoid paying taxes.
Perhaps an equally important
consideration for the interest on environmental taxes among
policy makers is that these can provide much needed government
revenues. Repetto, et.al. (1992) pointed out that
switching some of the revenue burden from taxes on income,
employment and profits to environmental charges on resource
waste, collection and pollution would yield double economic
benefits. Gains come in the form of improved environmental
quality, higher rates of savings and investments, and faster
productivity growth.
Among the MBIs is the emissions
charge for management of air quality. However, environmental
charges, as part of the tax system, have political
repercussions. For example, hard-core environmentalists may
think that paying taxes gives the firms "the right to
pollute", while industrialists see the added cost as a burden.
There are also financial managers who see environmental taxes
as another means of collecting much needed revenue. It should
be emphasized then that the main purpose of this MBI is to
correct externalities brought about by unabated pollution, and
that the revenue-generating aspect is just an added bonus.
The primary objective of this study
is to come up with an emissions charge that will induce
industries, particularly manufacturing firms, to reduce their
emissions to the standard levels. This implies that the
emissions charge be equated with the marginal abatement cost.
Figure 3. Distribution of
abatement effort
The study intends to set an
appropriate tax level based on the magnitude of actual
pollution concentration vis-à-vis prevailing environmental
standards. It aims to estimate the abatement cost incurred by
the selected industrial and electricity sectors in an attempt
to minimize emissions of air pollutants, notably of
particulate matter, in compliance to the set guidelines. From
the estimated cost functions, we will attempt to calculate a
uniform emissions charge. To ensure the continuity and
effectiveness of tax instruments as incentives, annual
adjustments on pollution charge per unit of emission to take
into account inflationary effects will be considered1.
The probable effect of the tax would
be to induce (a) energy conservation; (b) substitution of
other energy sources with less emissions; (c) substitution of
other technology for more efficient and less pollutive
production processes; and d) construction of pollution control
facilities.
The paper will adopt OECD’s Polluter
Pays Principle (PPP) which requires a polluting firm to pay
the full costs of measures to reduce pollution at levels
prescribed by the authorities to protect the environment from
the pollution resulting from its activities2.
The optimal emissions charge is achieved at the point where
the marginal control/abatement cost (MAC) corresponds with the
"allowable" levels of emission. Emissions exceeding the
standard shall be taxed accordingly (See Figure 4).
Where
Q* = the level of emissions in accordance to set air quality
standard
t* = the optimal emissions tax/charge
Figure 4. Defining an emissions
reduction scheme
Baumol and Oates (1971) succinctly
noted that whereas the above described resource-use prices
will not likely lead to a Pareto-efficient allocation of
resources, it is an easier and practical approach. Moreover,
it provides a least cost method of achieving the reduction
targets.
Note that the efficient solution
does not call for the total elimination of pollution. While
each firm faces a different abatement cost function depending
on its production capacity and available abatement technology
(among others), it results in n>1 optimal charges when matched
with the standard. Hence, the need for a least cost marginal
cost curve derived from marginal cost schedules associated
with different abatement technologies. This would serve as a
basis in the estimation of a uniform emissions charge across
polluters.
Figure 5 shows the framework for
arriving at a potential economic instrument, which is the tax
that meets a specified set of criteria. As an initial step,
the study looked into the existing government policies/laws
and how policy and market failures lead to environmental
problems. Ideally, environmental impacts are assessed through
corresponding economic valuation of damages but this was not
carried out in the present study. By setting environmental
targets and identifying the priority sectors, a set of
criteria was formulated. In this study, a pollution tax was
used as the economic instrument to control emissions.
Figure 5. Analytical framework
4.0 ESTIMATING EMISSIONS
A detailed emissions inventory for
Metro Manila is presented in Table 73.
In the Ayala Inventory, the more significant 149 emitters in
the DENR/NCR database were used in the model calculations.
The Ayala/EMB emissions inventory is
hampered by its selective coverage. As Urbair (1994) observed,
there is lack of industrial plant and emissions data in the
said surveys from the areas covered by the Laguna Lake
Development Area (LLDA). The areas excluded are Manila,
Quezon City, Caloocan,
Marikina, Pasig, Taguig and
Muntinlupa which form the bulk of Metro Manila. As industrial
establishments (particularly food manufacturers) abound in
these places, the said inventory is already underestimating
the emission loads. In view of the problems associated with
the said database, other estimates were made.
4.1 Pollution from Power
Generation
The estimates covering the period
1990-1995 were made based on the procedure outlined in the
Handbook of Emission Factors (1988). Specific data which
affect the plants combustion process obtained in a survey
(i.e., type of fuel used, sulfur content of fuel, actual fuel
consumption, operating hours) were used to adjust typical
emission factors for local conditions.
In Metro Manila, the power stations
are bunker-fuel oil (BOF) fired. The biggest facility is the
Sucat (Gardner) Power Station on the edge of Laguna de Bay in
Muntinlupa -- a four-boiler, two-stack base-load station with
a total power generating capacity of 850 MW. We also have the
Manila (Tegen) Power Station on Isla de Provisor in the Pasig River -- a boiler, two-stack
base-load station with a capacity of 2 x 100 MW. Supplementing
these two plants, especially during the energy crisis in the
early 1990s, are several power barges: Sucat Barge and Navotas
Barges 203 & 204. The Rockwell Station which used to supply
additional electricity had been on lease since 1993 and is not
included in the study. Table 8 presents a summary of the
estimates on these power stations. Details are contained in
the Appendices.
Table 7. Emissions from the industrial sector, Metro
Manila, 1990
Table 8. Estimated emissions from
BOF-fired power plants, Metro Manila,1990-1995 (in metric
tons)
Year |
Gross Energy Generation (in MWH) |
NOX |
PM |
SO2 |
CO |
CO2 |
1990 |
4,150.10 |
7,488.92 |
643.53 |
66,512.03 |
635.06 |
380,914.51 |
1991 |
6,217.07 |
12,810.43 |
964.04 |
99,638.70 |
951.36 |
570,631.04 |
1992 |
6,161.37 |
12,653.15 |
955.40 |
98,745.87 |
942.83 |
565,517.79 |
1993 |
4,657.04 |
8,625.46 |
722.16 |
74,639.44 |
712.66 |
427,460.22 |
1994 |
4,881.26 |
9,172.74 |
756.91 |
78,230.31 |
746.95 |
448,025.14 |
1995 |
4,299.63 |
7,778.16 |
666.72 |
68,908.80 |
657.95 |
394,640.80 |
Average
1990-95 |
5,061.08 |
9,754.81 |
784.79 |
81,112.52 |
774.47 |
464,531.58 |
Source of basic data: National Power
Corporation; Handbook of Emission Factors (1988)
4.2 Emissions from Selected
Manufacturing Industries
Two sets of estimates were made for
the manufacturing sector. One utilized the fuel consumption of
manufacturing establishments. The emission factors applied are
similar to those employed by Orbeta (1994).4
Process equipment, refrigeration, lighting and air
conditioning units primarily use electricity. Fuels are used
by boilers, cookers and mobile equipment. The boilers burn
bunker oil fuel, some LPG, diesel oil, bagasse and coal.
Diesel is used for start-up purposes and for vehicles. The
typical energy mediums would be boilers, electric generator
sets, kilns and furnaces and are major sources of flue gas
emissions.
The Ayala Inventory together with
the other pollution estimates served as a guide in identifying
the more pollutive industries in Metro Manila. These would be
a) food manufacturing; b) textile mills c) paper and allied
products; d) chemicals; and e) iron and steel.
Emissions from fuel combustion are
based on sales figures from the Department of Energy. The five
sectors listed above account for over 61% of Metro Manila’s
BOF demand. That alone is an indicator of these sectors’
relative importance in managing the emissions problem.
As a rule, it is necessary to
include emissions from production processes, especially in
computing for PM emissions. Orbeta and Indab (1996) showed
that 91.3% of PM emissions come from processing but for the
other pollutants the opposite holds. This observation becomes
relevant in view of the lack of data necessary to compute for
process emissions. It requires data on the production of the
sub-sectors expressed in terms of actual quantities of goods
produced (e.g., in kilograms or in gallons). Unfortunately,
what is often reported is the monetary values of products
produced by the industries. Sometimes if they are at all
reported they are in aggregate or national levels. Given the
above observation, we know the extent of underestimation of
the previous estimate and adjust these accordingly.
DENR records reveal that as of April
1998, 502 of the 737 major establishments in the metropolis
did not have the necessary pollution control facilities.
Conversation with some environment inspectors in the EMB
revealed that even among companies with existing
anti-pollution devices, not all are operational because
companies believe that these are too expensive to operate.
Such observations are taken into consideration in the
calculations. Tables 9 and 10 show the estimates.
4.3 An Application of the
Industrial Pollution Projection System
An alternative procedure is based on
the World Bank’s Industrial Pollution Projection System
(IPPS). The IPPS was developed based on the notion that the
scale of industrial activity, its sectoral composition and the
process technologies used in production affect industrial
pollution. The IPPS operates through sector estimates of
pollution intensity (pollution per unit of activity).
Estimates came from combining production with emissions data
from 200,000 factories in the U.S.
Table 9. Estimated uncontrolled emissions: processing and
fuel combustion bunker fuel oil, Metro Manila, 1997 (in metric
tons)
Table 10. Estimated controlled emissions: processing and
fuel combustion Bunker Fuel Oil, Metro
Manila, 1997 (in metric tons)
Most developing countries have no,
or at best, limited industrial pollution data but have
industry information on employment, output and value added.
This information can be applied to sectoral pollution
intensity estimates derived from US database, though they are
an imperfect substitute for measurements from country specific
data. The IPPS has been used in other countries to map
pollution control strategies.
O’Connor (1994) mentioned three
reasons why other countries might show different intensities
from that of the US. One, they may use more or less polluting
technologies than the US in any given industrial sector. Two,
even with the same technologies, different ages of capital
stock may be associated with different pollution intensities.
That is, the older the capital stock, the more polluting it is
going to be. Third, within a given 3 or 4 digit industrial
sector classification, the product composition of output may
vary considerably across countries and hence, there would be
differences in processes and pollution streams.
Eskeland and Devarajan (1996)
recognize that simplified models of emission generation which
uses marginal emission factors fixed by output or fuel use
abstract much of the variations among plants. Consequently,
these models may be inadequate for analyzing policies aimed at
modifying the determinants of the emission factors at the firm
level. However, they say that these have credibility in the
analysis of policies that would mainly change incentives at
broader levels.
The people behind the IPPS have
consistently noted that despite mitigating factors which cause
fluctuations in pollution intensities within identical sectors
between the US and developing countries, the relative ranking
of intensities across sectors usually remain constant,
especially with employment-based intensities.
To quote Laplante and Smits (1998),
"The purpose of such an estimation is not to supplement
proper monitoring activities of pollution sources. Its purpose
is, in the absence of such activities, to provide the
regulator with information that can be used to prioritize its
monitoring effort and allocate its monitoring resources more
efficiently."
For comparative purposes, an
estimate for emissions using the IPPS pollution intensities
are applying 1994 sectoral employment data presented in Table
11. These are basically uncontrolled emission. As expected the
results do not coincide with the calculations using the fuel
consumption data. The IPPS results should only be taken as a
guide for identifying problem sectors. These estimates are
more beneficial in ranking pollution sectors (and regions)
rather than in using them as absolute estimates of pollution
loads.
5.0 ON ABATEMENT COSTS
Environmental regulations and
standards would be more efficient if the regulator has
information on relative abatement costs. Otherwise, the
regulator might end up barking at the wrong tree.
Sell (1992) notes that in cases
where industrial emissions are concentrated on a few points,
abatement may be done through three basic systems:
-
Through dry
systems that use gravity, centrifugal force or fabric
filters to trap pollutants. These are relatively low cost
but are only effective in the removal of heavy
particulates.
-
Through wet
scrubbers which uses streams of water or other liquids in
order to improve collection efficiency. It is capable of
cooling and washing waste streams and in removing gas.
Operating costs of high efficiency systems tend to be
high.
-
Through
electrostatic precipitators wherein pollutants are trapped
by channeling the waste stream between two electrodes – a
high voltage discharge electrode and a grounded collecting
electrode. This is effective in collecting very fine
particles.
Table 11. Estimated emission loads, manufacturing sector
(employment-based) Metro Manila, 1994 (in metric tons)
Understandably, in the process of
controlling pollution, industries are faced with a menu of
choices. For example, when different industries decide on
generating their own power, they would have common control
problems (in this case, sulfur oxide removal). At the same
time they would be having unique problems due to differences
in sectoral production processes. In effect, sectoral
abatement costs would reflect a mix of common and sector
specific costs. Costs of controlling discharges would vary not
only across subsectors but even within the same industry
across firms of different scales and with capital equipment of
different vintages (World Bank 1993).
For industries in Metro Manila, the
presence of standards and a penalty scheme does not seem to
deter their dumping/polluting activities. Most of the existing
factories have devices only for controlling dust and
particulates. Statistics show that majority of the industries
have already been served notices of violations and fined by
the Pollution Adjudication Board of the DENR. Commercial
operators prefer to pay the P50,000 fine5
thinking that complying with environmental standards is too
costly. One wonders how they ever got their permits to
operate. Unlike in water pollutants where the evidence
remains, the problem with emissions is that they tend to
disperse as they exit the stacks.
Despite the supposedly strict rules
set forth by the DENR/EMB, its enforcement record leaves much
to be desired. In cases brought to the PAB, a cease-and-desist
order and a fine is imposed. However, as cited in ADB (1997),
it seems that fines are rarely collected as evidenced by the
paltry amount of P329,000 (US$12,700) collected by the
DENR from 1989 to 1993.
The power plants surveyed rely only
on tall smokestacks, multicyclones and dust collectors as
anti-pollution devices (Table 12). The tall smokestacks
commonly used by industries and utilities in Metro Manila do
not remove pollutants but simply boost them higher into the
atmosphere, thereby reducing their concentration at the site.
These pollutants may then be transported over large distances
and produce adverse effects in areas far from the site of the
original emission. Considering that sulfur dioxide emission is
the major problem of power generation, these anti-pollution
devices will not suffice. The cyclones and dust collectors are
part of the plant design for the turbines to work effectively.
Thus, they are basically for maintenance purposes and the fact
that they control PM is just a plus factor. This means that
the cost of environmental protection (via the installed PCDs)
is part and parcel of the fixed assets and current operating
expenditures of the power facilities.
The NPC has admitted that at
present, we do not have any treatment facility for NOX
and SOX in the Philippines. Only the Calaca 2 and
Pagbilao plants located outside NCR are equipped with low NOX
burners and there are no Flue Gas Desulfurizers yet in any of
the plants. With the impending more restrictive SOX
emission limits in 1998 from 1,500 mg/m3 to 700
mg/m3, the power generation sector will be in
trouble. What is even more disturbing is the NPC’s decision to
veer away from the use of diesel and fuel oil in power
generation and instead boost its use of coal in a bid to
reduce the country’s dependence on imported crude oil. Local
coal, being of lower quality (in terms of sulfur content and
heating value), is going to exacerbate our SOX
problems.
Table 12. Pollution control
equipment by generating plant, Luzon Grid
Plant |
Plant Size
(MW) |
Fuel Type |
Stack Height
(m) |
Air Pollution Control |
Water Pollution Control |
TS |
DC |
ESP |
Sep |
SNB |
Inj |
Malaya |
650 |
Oil |
90 |
X |
X |
|
X |
X |
|
Sucat |
850 |
Oil |
122 + 87 |
X |
X |
|
X |
X |
|
Manila |
200 |
Oil |
76 |
X |
X |
|
X |
|
|
Bataan |
225 |
Oil |
84 |
X |
|
|
|
|
|
Tiwi |
330 |
Oil |
22 |
|
|
|
|
|
X |
Macban |
330 |
Geo |
22 |
|
|
|
|
|
|
Batangas |
300 |
Coal |
120 |
X |
X |
X |
X |
X |
X |
Navotas |
160 |
Gas |
11 |
|
|
|
|
|
|
Source: National Power Corporation
Notes: TS = Tall Smokestack; DC = Dust Collection with Ash
Disposal;
ESP = Electrostatic Precipitator; Sep = Oil/Water Separator;
SNB = Settling/Neutralizing Basin; Inj = Brine Reinjection
The Urbair report estimated that
power-generating plants require an initial outlay of US$10
million for an electrostatic precipitator (95-99% effective)
with an annual cost of US$3-5 million. WB (1993) valued 90%
percent SO2 reduction via flue gas desulfurization
at approximately $1,500 per ton (including capital
amortization and operation). To put this in perspective, the
over 81,000 tons/year of SO2 emitted by the Metro
Manila power plants estimated in 1990-1995 would require
US$121 million annually. Given the prohibitive costs of the
said devices, an alternative feasible measure is to switch to
low sulfur fuel since SO2 emission is proportional
to the sulfur content of the fuel. In addition, the use of low
sulfur fuel leads to a decrease in PM particles. As mentioned
earlier, power plants are currently using BOF with 3.12%
sulfur. Reducing the sulfur content to 2% will reduce the
emissions from power plants by 40%.6
The actual cost involved will depend on the sulfur premium,
which is the increase in the world market price of fuel oil
with decreasing sulfur content. Urbair places the sulfur
premium to be around US$5-10 per ton per percentage sulfur.7
The basic components of an air
pollution control system are: hood, ductwork, the air
pollution control device or collector and fan. Many iron and
steel companies have inadequate design of hoods rendering
their pollution control systems and costly to operate. Hoods
are suction points wherein contaminants enter the system. Many
ductworks are worn-out and have leakages. Also, the fan
components are underrated resulting in less efficient systems.
Most industries that require pollution control equipment rely
on cyclones, bag houses or electrostatic precipitators. There
are no wet systems like spray towers or venturi scrubber.
For the food manufacturing and
textile industries, the use of cyclones and mechanical
collector would be most appropriate in dealing with their
airborne problems. In contrast, for paper and chemical
manufacturing, wet scrubber and baghouses should be included
in their acquisitions list. Table 13 provides a list of
abatement technologies available.
In the food processing industry,
dust is generated during conveying, screening, mixing and
grinding of dry raw materials. Dust collectors such as
cyclones and filter bags are used to avoid dusty conditions in
the processing areas and to recover valuable raw materials.
One company even mentioned that odorous exhaust gases from
cookers and dryers of the plant are controlled using packed
tower wet scrubbers. Chlorine or potassium permanganate is
often added to scrubbing water.
The paper and pulp sector generally
acquire used equipment from foreign pulp and paper companies.
As such paper mills operate outdated and old machines usually
lacking in spare parts and adequate instrumentation or
control. Automated controls are no longer operational and have
to be operated manually. As a result the mills produce
excessive wastewater and to lesser extent, atmospheric
discharges.
What seems to be a recurring
scenario is that most companies do not know exactly how
efficiently they are burning fuel. Hence, combustion might be
occurring with too much excess air or with deficient air.
Either way, energy is wasted. Ensuring combustion efficiency
with efficient burners is viewed as the best and most
inexpensive means of reducing the emissions of unburned carbon
and hydrocarbons (Raytheon Engineers and Constructors, Inc.,
1994). Moreover, pollution control devices are inadequately
maintained or inappropriately designed. Punctured bags in
baghouses contribute to emissions in some facilities.
Ironically, this could easily be rectified.
The report of Hartman, Wheeler and
Singh (1994) on pollution abatement costs of US manufacturing
industries can serve as a guide. The data is based on a 20,000
plant random survey and the fact that the US manufacturing
sector is "characterized by enormous variation in equipment
vintages, processes, operational efficiency and degrees of
operation control" which would enable countries without
adequate data to use it as a ballpark estimate. The authors
believe that these estimates will "provide conservative
upper-bound estimates of pollution control costs in developing
countries. Its major handicap, however, would be in grouping
together the most expensive with the cheapest control possible
in a single category, which generated high variances in the
results. Table 14 is culled from the study while Figure 6
illustrates how the different industries compare in terms of
the abatement costs for PM and SO2.
Table 13. Cost of controlling emissions from stationary
sources (in P1992/mt)
Table 14. Average abatement cost by sector, 1979-1985 (in
P1993/mt)
Figure 6. Average abatement cost
for PM and SO2 (P1993/ton)
Aside from the typical end-of-pipe
treatment, Urbair (1997) considers switching to cleaner fuels
for fuel combustion other than for power production (lowering
sulfur content in heavy fuel oil to 2%) and computes the cost
to be around US$10-20 per ton of fuel. Reducing sulfur content
of fuel used will reduce emissions by as much as 40% (Table
15).
Table 15. Cost-effectiveness of
clean fuel
|
Characteristic |
Effectiveness |
Cost |
Power
generation |
|
|
|
|
|
|
Fuel
combustion other than for power production |
|
|
|
|
|
|
Source of basic data: Urbair (1997), MEIP
Lately, there is a growing interest
in reducing or eliminating industrial waste at the source due
to the economic benefits associated with it. This involves
substitution of environmentally acceptable materials in the
process, changes in process operations, recycling and reuse of
waste materials. While effectiveness of such programs is not
easily established at this point, one cannot say that they are
insignificant. In fact, in one of companies, upgrading and
re-fitting equipment was being planned but the financial slump
forced them to shelve their plans.
6.0 MBIs: THROUGH THE LOOKING
GLASS
The choice of a market based
instrument for environmental protection is not only dictated
by perceived allocative efficiency but by its acceptability to
members of the system affected. A study conducted under the
Industrial Environmental Management Project of the DENR and
USAID examined the issue of MBI’s acceptability in the
country. Industry groups were asked to rank from 0 to 3 (from
the least to the most suitable) seven MBIs and evaluate them
in terms of the following:
-
market
penetration (would the MBI affect environmental
decision-making within the industry or sector?)
-
equity and
fairness
-
economic
efficiency (do costs justify the benefits?)
-
political
feasibility
-
administrative
feasibility (could the instrument be implemented under
existing administrative set-up or would additional
resources be necessary?)
-
effectiveness in
achieving objectives (can the MBI bring about compliance
and bring about voluntary pollution prevention?)
The result is presented in Table 16.
Table 16. Suitability ratings of selected MBIs in the
Philippines
Interesting enough the above results
coincide with findings of a survey and roundtable discussions
done by the ASEAN Environmental Improvement Project together
with the Management Association of the Philippines and the
Asian Institute of Management on selected CEO’s reaction to
MBIs. The survey showed the following:
-
Most CEOs, though
unfamiliar with MBIs, were in favor of the use of market
forces for environmental management.
-
Philippine CEOs
favored markets for waste and financial incentives – MBIs
that directly contribute to company revenue. User fees which
tend to cut into the firm’s income were the least favored of
the economic instruments.
-
CEOs generally
favor schemes they are more familiar with and expressed
interest and openness to learn more about how to implement
MBIs.
-
Some CEOs think
MBIs involve complicated procedures and can work well only
with responsible companies and governments.
-
Many CEOs
recommended implementing a more comprehensive environmental
protection program directed at internalizing corporate
values on the environment, competing globally to meet world
class environmental standards and strong and fair
enforcement of environmental laws.
The findings are predictable
considering the interests of the producers /manufacturers on
the impact of MBIs on their bottom lines. Despite their
appeal, most MBIs are hard to administer and can be
politically unacceptable. It is then essential that the fiscal
instruments designed for pollution control be appropriate to
the existing situation. It is interesting to note that there
seems to be a preference for input taxes over emission
charges. This is understandable in the case where there are a
lot of players in the market such that monitoring would be
extensive and costly. However, it was shown that a large part
of the responsibility on the fouled up air quality in Metro
Manila lies on only a handful of industries. Hence, an
emissions charge seems appropriate.
7.0 EMISSIONS CHARGE ESTIMATES
Estimates of various pollutants
emitted can be arrived at in several ways as discussed
previously. In computing an emissions charge, relevant data is
the ambient air quality. With the inadequacy of ambient
quality monitoring, the next best thing is to adopt the
results of a dispersion modeling. Urbair (1997) used a
dispersion model to establish the relationship between
emissions and air quality in Metro Manila. It covered power
plants, industrial zones and other major exposure areas. Based
on its results, PM concentration in the area exceeded the
national air quality guidelines by as much as five times.
While this is alarming, most of it comes from vehicular
sources and is not within the scope of the current study.
Ambient concentrations in the NCR area have exceeded the
standards for SOX by 54.8 %. Assuming a linear
relationship between level of emissions and ambient quality,
then we say that there is a need to reduce emissions also by
54.8%. In terms of the quantities this would be 36,647 metric
tons of the 66,873 metric tons of sulfur dioxide generated by
the entire manufacturing sector.
Given the above conditions, which
industry is likely to purchase PCDs to avoid paying SO2
emissions charge? The data on average abatement tells us that
it would be the furniture manufacturers having the lowest
abatement cost. While data is not the marginal cost we are
interested in, at the least-cost combination, the marginal
cost would be equal to the average cost. Using these we can
achieve a desired level of abatement at the lowest possible
cost which is the biggest advantage of MBIs. The cost
structure can also serve as a guide for setting the emissions
charges. By setting a charge higher that the minimum-cost
solution, there would be some voluntary abatement by the
firms. The US data, which obviously reflects foreign
technology, would have to be adjusted upwards to reflect cost
of transportation (PCDs are exempted from import duties and
local taxes if the firm importing belongs to an industry
covered by the Investment Priorities Plan).
It would be erroneous to assume that
industries are able to achieve a hundred percent removal of
pollutants. While removal efficiency of pollution control
devices can go as high as 99.99% for newly installed ones,
most old firms rely on vintage technology; poor maintenance
will reduce that capacity. Authorities place the expected
removal at around 50-80% across industries to account for the
different technologies in place.8
Tables 17a and 17b show the sectoral emissions for particulate
matter assuming 80% and 50% removal efficiency, respectively
as computed via the IPPS and the cost data by ascending
average abatement. Similar tables are constructed for sulfur
dioxide (Tables 18a and 18b).
To illustrate, if we assume an 80%
removal efficiency of the PCDs and desire to achieve a 60%
reduction in PM, then we should charge around P4,500/ton
of PM emitted. Similarly, if the target is to meet the
national ambient standard for sulfur dioxide (58.4% reduction,
as per Urbair finding) at 80% removal efficiency of PCDs, a
charge of approximately P14,200 per ton of SO2
emissions has to be levied. In other words, the marginal
social cost at 58.4% abatement of SO2 is P14,200/ton.
The higher the desired level of abatement, the higher will be
the cost of abatement. In instances where the abatement
technology in place is inefficient and poorly maintained, the
cost will tend to be even higher. To understand the dynamics
further, several graphs are constructed for illustrative
purposes. Figures 7a and 7b are applicable for particulate
matter while Figures 8a and 8b should be used in conjunction
with Tables 18a and 18b for sulfur dioxide.
From the above exercise it can be
observed that the cost of sulfur dioxide clean up is
prohibitive. As mentioned before, there are hardly any
facilities capable of dealing with SO2 emissions.
Not even the three power plants have the necessary equipment.
A more realistic way of controlling SO2 is via the
sulfur content of the fuel used. The predominant fuel used is
bunker oil fuel with 3% sulfur content as prescribed by law.
Reducing it further to 2% will mean an additional US$10-20 per
ton of fuel but this will reduce SO2 emissions by
40% and an added bonus of decreasing PM as well. This roughly
translates to P272-543 (in 1993 pesos for comparative
purposes). Obviously, this is a more feasible and cost
effective alternative. Reducing O2 emissions by a
measly half a percentage point via end of pipe treatment will
cost a firm nearly as much.
Table 17a. Cost-effective regulatory strategy for
particulate matter
Table 17b. Cost-effective regulatory strategy for
particulate matter
Table 18a. Cost-effective regulatory strategy for sulfur
dioxide
Table 18b. Cost-effective regulatory strategy for sulfur
dioxide
Figure 7a. Abatement cost for PM
(80% removal efficiency)
Figure 7b. Abatement cost for PM
(50% removal efficiency)
Figure 8a. Abatement cost for
sulfur dioxide (80% removal efficiency)
Figure 8b. Abatement cost for
sulfur dioxide (50% removal efficiency)
The above analysis dealt with the
manufacturing sector. As often mentioned, the power generation
sector is a major contributor to the pollution problem in
Metro Manila. The use of filters will reduce PM by more than
95% and will cost less than US centavos 0.1 per kWh of power
generated or P1750.86/ton of PM.9
This is lower than the average abatement cost faced by the
manufacturing sector since the multicyclones and the filters
are part of the turbine designs which have to be maintained
otherwise they will not function. So some of the control costs
must have been incorporated in the operating expenses of the
facility itself. Due to tall smokestacks that disperse
emissions, power plants are not significant sources of ground
level particle concentrations. But SO2 control is
more expensive. Flue gas desulfurization will cost P40,725/ton
of SO2 cleaned. Again the cheaper alternative is to
switch to low sulfur fuels as shown in a previous table.
Because power plants are charged a lower price when they
purchase fuel, the switch will only cost an additional P136-272/ton
of fuel used.
As power stations make more
contributions to ambient air quality deterioration, they
should be charged a different fee from that of the
manufacturing sector. The PM and SO2 charges would
depend on the cost of clean up aforementioned.
A two-tiered charge structure can be
designed for Metro Manila. There can be separate charges for
particulate matter and sulfur dioxide: at the same time there
will be different charges for the power plants and the
manufacturing sector. For the power generation sector, P1750.86/ton
of PM emitted can be used as a baseline value. The amount to
be charged initially for PM may be small but knowing that the
emissions can be about four times the normal emissions if the
multicyclones and filter bags are out of order, the cost to
the power plant (and the potential revenue) then becomes
substantial and provides the incentive to properly maintain
their existing control facilities. Before setting a charge for
SO2 emissions we need to consider the options at
hand (Table 19).
Table 19. Alternatives for controlling SO2
A P40,725/ton of SO2
emitted can be charged to power plants to force them to
prioritize the acquisition of sulfur dioxide control
equipment. Since the government owned NPC runs the power
plants, it would appear that the monitoring and implementation
of the law governing pollutive activities is compromised. The
lack of ample electricity supplied means we can not afford to
shut them down for a long time for rehabilitation; neither
does the NPC have the funds to do so. Perhaps the moves to
privatize NPC would be able to address the problem. To meet
the standards, the power plants can use the 2% sulfur fuel. In
Table 19, to achieve a 40% reduction would mean an additional
P136-272/ ton of fuel used, which translates to about
P2347.36 to P4694.72 per ton of SO2.
There is a wide disparity in the options provided such that a
more realistic level rests somewhere in between but if the
intention is to influence the behavior of the players
immediately then the upper bound seems appropriate at this
point.
For the manufacturing sector, a
simple simulation using the data provided earlier on the
average abatement cost and emissions by each sector is
presented. Let us assume that pollution control devices
currently installed would only have a 50% removal capacity
(Tables 20 and 21).
Table 20. PM charges assuming 50%
reduction
Potential Charge (pesos per ton) |
% Emission Abated |
Remaining Emission (in tons) |
Potential Revenue (in million pesos) |
542.40 |
9.88% |
9,856.27 |
5.35 M |
176.80 |
17.00% |
9,077.57 |
16.00 M |
2332.32 |
32.12% |
7,423.92 |
17.31 M |
Note: The total emission amounts to
10,936.83 metric tons
Table 21. SO2 charges
assuming 50% reduction
Potential Charge (pesos per ton) |
% Emission Abated |
Remaining Emission (in tons) |
Potential Revenue (in million pesos) |
5,776.56 |
7.72 |
3,0857.05 |
178.25 M |
7,037.64 |
14.77 |
2,8499.63 |
200.57 M |
14,129.52 |
27.55 |
2,4226.19 |
342.30 M |
Note: The total emission amounts to
33,438.5 metric tons
It is evident that increasing the
amounts of emissions abated will increase the cost of the
exercise. If the PCDs are only capable of removing 50% of the
emissions, to reduce PM emissions by 10% means that the firm
can either pay the tax of P542 per ton emitted or
undertake the clean-up on its own.
While the Philippines has minimal
administrative experience and financial capacity, as seen from
the experience on mining and forest charges, environmental
taxes appear to be feasible. We can not say that this is the
optimal solution considering the amount of literature spawned
against emission charges. According to Tietenberg and Wheeler
(1998) while the introduction of MBIs have added flexibility
and improved cost effectiveness it has not solved all of the
problems of pollution regulation. The lack of manpower and
adequate budget made designing, implementing, monitoring and
enforcing MBIs doubly hard. Still, compared with subsidies and
emission standards, emission taxes have an added appeal of
raising revenue while curbing pollution loads. With the
exception of lump sum taxes, the conventional tax measures
possess a distortionary cost in the form of induced changes in
the taxpayers behavior. Environmental taxes possess an
"efficiency value" if the said tax revenues would replace
those obtained through distortionary means.10
There has been substantial interest in the potential of
environmental taxes to reduce the costs involved in raising
fiscal revenues. Unlike the typical taxes, environmental taxes
correct economic distortions (i.e., the failure to price
pollution in accordance to its social cost). Hence, we have
the "double dividend" argument -- aside from the environmental
benefits, the revenue gains will allow reduction on other
taxes that may have distortionary effects on the labor supply,
investment or consumption.
Economic instruments like the
pollution tax intends to provide an incentive function in
order to make the players choose the most appropriate measures
based on their own assessed cost and benefit. This is going to
be difficult to achieve in the short run as the introduction
of the new tax measures will have economic and political
repercussions. To facilitate the transition, the revenue
obtained from the proposed emission charge can be used for the
following purposes: a) improve monitoring and enforcement; b)
clean up the environment; c) invest in research and
development; and d) subsidize the acquisition of pollution
control devices. The choice of subsidy as the top MBI for the
business sector may help in forging cooperation and bankroll
the initial stages of the cost of abatement. Note that this
does not mean that we should provide artificial support to
obsolete plants. Lovei (1995) discusses the role of effluent
charges in providing pollution abatement funds in Central and
Eastern Europe. This can also be done in the
Philippines.
The experience of OECD countries
attests to the fact that MBIs need to be used with regulations
to be effective. Institutions like the community may be tapped
to strengthen the incentive mechanism particularly in Asian
settings where the concept of "hiya" (shame) is strong.
Dasgupta, Laplante and Mamingi (1997) looked at the stock
market reactions to environmental news in Argentina, Chile,
Mexico and the Philippines and noted the following: 1) stock
values rise when good environmental performance is publicly
recognized by the government; and 2) stock values fall in
response to publicized citizens' complaints about the
polluters. Still, the use of the capital market as a
reinforcing mechanism tends to be constrained to the extent of
its development and if pollution-ridden industries are listed
in the market. Also, since majority of the consumers belong to
the lower income brackets, their primary consideration remains
to be the level of prices.
One needs to clarify the role of the
MBI in the scheme of things -- as a revenue raising device
and/or an incentive mechanism. As the rate of charges rise,
the government's revenue increases but this is checked by a
decline in the pollution discharges by firms. The more
inelastic the abatement cost function, the bigger the
potential revenue; but as the tax burden grows the greater the
incentive for the firm to abate. One must also consider the
cost recovery principle in the design of the tax. Manasan
(1994) noted that the contribution of user charges in total
national government revenues declined from 15.3% in 1976 to
5.8% in 1992. This has been attributed to the government's
failure to adjust user charges to reflect changes in the cost
of producing goods and services. For the proposed emissions
charge, it should be adjusted for inflation.
To sum up the proposed emissions tax
has the following structure:
-
For the
manufacturing sector, charge P4,500/ton of PM
emitted in excess of the allowable amount; P14,200/
ton of sulfur dioxide emitted.
-
The tax and its
related components should be evaluated regularly to check
for efficacy and relevance. The uniform charge initially
set may evolve into a system where beyond a certain range
of emissions being taxed, a higher rate can be imposed to
excessive emissions. In this way, the industries will be
forced to limit emission to the bare minimum.
8.0 ENVIRONMENTAL TAXES: ISSUES
AND CONCERNS
Drawing down from the extensive
experience of the OECD countries which pioneered the use of
MBIs are some lessons that are relevant to developing
countries (See OECD, 1996 and 1997; O’Connor, 1996). Product
charges are the most common followed by emission charges.
Examples of charges and taxes currently in effect are:
-
Water pollution
charges in France, Germany and the Netherlands
-
Nitrogen oxides
charge in Sweden
-
Sulfur tax in
Sweden
-
Carbon taxes in
Finland, Sweden, Denmark, the Netherlands
In designing a pollution tax,
certain conditions have to be met. An "ideal" tax should be
able to answer all of the following in the affirmative:
-
Effectiveness:
Is the tax or instrument able to succeed in reducing the
pollution?
-
Efficiency:
Is the instrument able to cost-savings or minimize abatement
costs across polluters?
-
Administration:
Is the cost involved in administrating the instrument
reasonable?
-
Dynamic Effects
and Innovation: Is the instrument able to bring about
innovation in pollution technology?
-
Behavioral
Effects: Is there a change in attitude, awareness and
capacity building due to the instrument?
-
Revenue
Generation: Is the instrument able to reduce other forms
of taxes or will there be increased spending for
environmental protection?
It seems that the Philippines is
headed towards emission charges to further environmental cause
(ADB, 1997 and Clean Air Act). The efficiency case for
environmental taxes as redefined in the standards and charges
approach do contribute in achieving predetermined policy goals
but as the cliché goes, it’s no panacea.
A pollution tax is not confined to
emission charges. It could take the form of an input or a fuel
tax to account for the differential effects of different types
of fuel (e.g., Sweden’s diesel tax). In the Philippines,
industries generally use BOF for firing their equipment. The
maximum allowable sulfur content of residual fuel is 3%. While
this is already lower than what was used earlier during the
decade, it still is potentially hazardous to health. As such
we can also adopt a fuel tax. An input tax has the advantage
of being easier to put into action as there is automatic
collection of revenues from the sales of the fuel.
Despite the absence of any formal
position on the part of the Department of Energy, it seems
logical that a fuel tax would be unpopular considering that
prices of fuel in the country is already among the highest in
the region, second only to Japan. The deregulation of the oil
industry did not bring about the expected price drops.
Moreover, such a tax, imposed early in the production chain
faces the danger of including in its tax base those activities
that do not damage the environment. As pointed out in OECD
(1996) in such instances, a rebate system has to work in
tandem with the tax (and that will increase administrative
cost) so as not to penalize those who practice environmentally
friendly processes.
All emission related problems should
be included in the tax base. The base would differ if the
pollution arises from production or consumption. In the
manufacturing sector, they are part of the base albeit, can be
at either poles. Also, the number of polluters and whether the
source of pollution is scattered or point-source will
determine the optimal point of tax imposition.
The tax should reflect market
prices. Policy makers should have information regarding the
cost functions of polluters in different areas. We have to
reiterate that for firms facing huge abatement costs, it might
be advantageous just to pay the tax instead of coming down on
emissions. How large is the tax going to be in order to
achieve the necessary reduction? The tax should be adjustable
given certain changes in conditions. Otherwise, inflation may
erode its incentive effect. The P50, 000 per day fine
in the Philippines has to be revised. There are a lot of
materials dealing with the EMB and DENR’s limited capacity to
regulate and administer the country’s environmental laws. The
fine would appear to be minimal especially with the lax
monitoring: you only pay if you get caught.
The choice between an emission and a
product tax will also depend on the cost and ease of
monitoring. It is easier to implement an emissions charge if
there are few, large, stationary sources. For diffuse and
numerous sources, product taxes would be more appropriate.
Pollution taxes should be imposed as close as possible to the
point of emission to minimize collection points. The major
concern at the moment would be how ready is the DENR/EMB to
implement an emissions charge. Considering that there are only
a handful of sectors responsible for over 70% of pollution in
Metro Manila, yet DENR/EMB are hampered by limited resources
and institutional limitations.
While conducting the study, it
became apparent that anchoring a tax solely on particulates is
not advisable. As mentioned earlier, most of the PCDs used are
geared towards PM control. There are other pollutants being
spewed out in larger quantities and therefore, require greater
control. On the contrary SOX and NOX
emissions tend to be concentrated on a handful of polluting
units, hence, they may be appropriate tax avenues. If a tax on
all the pollutants be devised, how should the weights be
assigned? Do we need to have graduated or differential taxes
wherein larger quantities emitted would be slapped higher
fees? In designing appropriate environmental taxes, the end
goal should be the change in behavior of players.
Environmental taxes should not be viewed as substitutes for
the other taxes because like any ordinary tax they have short
and long term behavioral effects. Revenue from environmental
taxes should serve the environment and should be earmarked
accordingly. Previous experience in the country, as in the
case of forest charges, showed how the revenues got lost in
the government coffers. As incidence of pollution drops we can
expect revenue from environmental taxes to drop and policy
makers should view that as a move towards the right direction.
In view of the above, if the
emissions charge is put in place there is a need to:
-
Improve
collection and information dissemination (information on
prices, technologies, environmental conditions and
objectives);
-
Strengthen the
institutional and technical capacity of the line agencies
tasked with administering environmental regulations;
-
Review existing
fine and penalty schemes to account for present
conditions;
-
Simplify policies
and synchronize policies to avoid working at cross
purposes; and
-
Conduct a review
of economic policies that have a substantial impact on the
environment.
1
The Clean Air Act calls for at least 10% adjustment every
three years for the fines to maintain their deterrent
function.
Back
2
The PPP can be interpreted in two ways: (a) as requiring the
polluters to pay only the cost of pollution control &
prevention; or (b) interpretation (a) plus compensating the
people for damages they suffer from pollution. This study uses
the narrow PPP interpretation.
Back
3
Ayala (1993) used the following assumptions for the emissions
inventory: 1) application of the US-EPA emission factors.
Adjustments were made to account for the presence/absence of
control devices, efficiency of control, fuel composition; 2)
rated capacity of the facility is equated into its equivalent
fuel consumption and process rates for fuel burning sources
and process operations; 3) effective operating period of the
facility is set at 12 hr/day with 200 days/year; 4) composite
efficiency of the control device for PM is 50% while the
composite efficiency of the control device for the reduction
of gaseous pollutants like SOx is negligible; 5) power
interruption period is equivalent to 10% of the effective
operating period; and 6) short ton (2,000 lb/ton) is used as
conversion factor.
Back
4
These are also taken from the 1990 Metro Manila emissions
inventory which are basically from the US-EPA and WHO Rapid
Assessment Methodologies.
Back
5
The recent Clean Air Act upped the fine to a maximum of
P100,000 per day but some environmental planners think this is
still low.
Back
6
The use of lighter types of fuel oils (grades 5 and 4) will
lead to even greater reduction in SO2 emissions but they are
more expensive.
Back
7
They estimated that in 1995 the fuel consumption in power
plants was about 1.4 million tons and that purchase of oil
with a sulfur content of 2% instead of 3% would cost an
additional US$10 million.
Back
8
Estimate was obtained in consultation with EMB and DENR
personnel and concurred upon by a pollution device service
provider.
Back
9
Based on World Bank (1993) estimates for a coal-fired
facility. This should be considered an upper estimate since
the cost of pollution control for a coal-fired facility is
higher.
Back
10
Terkla (1984) defines efficiency value as the reduction in
excess burden resulting from the substitution of these
revenues for current and future resource distorting tax
revenues.
Back
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Appendices
Copyright 1997 ©
International Development Research Centre, Ottawa, Canada
dglover@idrc.org.sg |
20 June 2000
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