"At one time the earth's atmosphere was primarily CO2, and as the plants that trapped that CO2 were eventually turned into crude, the CO2 remained in the ground. When we burn gasoline, we release it.
Then there's Ethanol, which also releases CO2, the difference is that its CO2 comes from the present atmosphere, therefore there's no net gain.
look at it as if Ethanol come with built in Carbon credits."--HB

if this horsechit really concerned you then you would truly be appalled by the CO2 release associated with catastrophic forest fires