"Technological progress is like an axe in the hands of a pathological criminal" _______Albert Einstein
"People who dream of the joys of living in a space colony deserve to live in a space colony" ___ Edward Abbey
Some examples of tools that pollute through their use are: motor vehicle, gasoline-fueled lawn mower, radio powered by toxic batteries, electric tools where a polluting source of electricity is used. Basically anything that burns gasoline or diesel to get a job done is polluting through its use.
The manufacture of photo voltaic cells releases as many as 7 different toxins into the environment. Since their life span is only 20 years, we do not feel they are an appropriate technology for a garden.
We burn wood and other natural materials to cook when a solar oven cannot be used. We strive to minimise the wood we burn and maybe ultimately eliminate it.
Wind turbines or small hydro without toxic batteries would be an acceptable way to generate electricity. Personally, we think it best not to waste time with electricity at all, so we live happily without it. However, we would not stop others from using it in a non-polluting way at the garden.
A bicycle pollutes a bit in its manufacture, but we feel its utility and long non-polluting life span make it ok. The same with steel tools and other durable manufactured items.