Algae = 70% of worlds Oxygen supply and probably gets rid of most of the worlds CO2 - chopping down trees just means that we release the locked up CO2 as they're actually very inefficient at changing CO2 into oxygen (not to mention they respire and let some of the CO2 back into the atmosphere). Also, as i said, under 1% of the Earth's gases is CO2 so increasing the levels really won't have much of an impact. What will is the level of methane which is a lot better at warming up the planet and it is probably our huge increase in farming cows and rice. If you had to choose between cows or cars, which would you choose?
By reading this signature you agree that mixster is superior to you in each and every way except the bad ways but including the really bad ways.