The Perplexing CO2 Problem

The US produces only 16% of the global CO2 emissions, so even if we aggressively restricted CO2, it would do very little to reduce global levels.

Ref: http://www.eia.gov/cfapps/ipdbproject/IEDIndex3.cfm?tid=90&pid=44&aid=8

Two good articles on this by Chip Knappenberger can be found here:

http://www.masterresource.org/2011/12/us-co2-cuts-math/

http://www.worldclimatereport.com/index.php/2011/04/14/biggest-drop-in-us-greenhouse-gas-emissions/