until the greenhouse effect is proven to be the cause of global warming and no longer a "widely accepted theory" perhaps our efforts to better ourselves and our planet should be utilized in other means...
you can prove acid rain though... that's why we use basecoat/clearcoat paint on cars now instead of enamel. If you paint a car using enamel paint now you can see very very small spots from acid rain if the car isn't dried immediately. Acid rain is being combatted with new Ultra low sulfur diesel and clean coal technology.
you can prove and document earth's temps over periods of time but no one has yet to prove that the "greenhouse effect" is the cause of global warming....as opposed to say the sun (which we know very little) or earth's natural cycle... wasn't there an ice age a long time ago and dinosaurs and all kinds of non modern day life that existed and were destroyed...not by burning fossil fuels?
but thus far the argument for the greenhouse effect as the cause of global warming is correlation...not causation
and has yet to be PROVEN
Just my two cents...