CO2 makes up approximately 3/100ths of the Earth's atmosphere. Numbers like that are sort of nebulous for most folks unless they are put into something they can relate to.

1 gallon of water = 128 oz's or 256 tablespoons. 1 tablespoon = .5 oz's. If the Earth's atmosphere were a gallon of water CO2 would make up 3.84 oz's or 7.68 table spoons. But, this is for total CO2 levels, man made CO2 accounts for approximately 3.225% of the 7.68 table spoons or .24 (1/4) of a tablespoon in a gallon of water.

So what's the answer for modern day transportation? Hydrogen fuel cell cars? The exhaust they produce is water vapor which is responsible for 95% of the green house effect. Wouldn't this then increase global warming?

__________________
Barack Obama's Executive Flop

If Obama couldn't lead such a small organization as the Chicago Annenberg Challenge to success, how can any one bellieve he can lead this country to it?