The primary source of carbon for the trees that the tree-huggers hug is the C02 that the trees glean from the atmosphere.
Thus, in like manner, C02 is an environmentally friendly gas to all carbon-containing organisms including trees, corals, seashells, the veggies we eat, the grass the beef cattle we butcher, etc.
Do we need to produce MORE C02 to make our environment even better?
It's just a little ironic huh? the envirowackos are scared of CO2..which might help vegitation...methane....which has a half-life of only 7 years... another thing that gets me...they recycle glass...glass is made from sand, which is one of the more abundant chemicals we have on this planet...also, it takes MORE energy to recycle glass than it does to make some new glass from sand! If I ever meet an envirowacko that is a stock analysts then I'm just going to do the opposite of what they say and I'll get rich.