As much as it may pain many of the more faithful believers in Anthropogenic Global Warming, it turns out George W. Bush's approach to the reduction of greenhouse gases was the right one.
Bush has been criticized for not embracing the Kyoto Protocols, a treaty that was rejected unanimously by the US Senate during the Clinton administration. It obligated the US to onerous measures in order to drastically reduce greenhouse gas emissions. Many of those measures would have crippled the US economy while those countries exempt from the limits imposed by Kyoto would have been able to continue increasing their emissions and expand their economies with no consequence. President Bush certainly wasn't going to sign on something that would do nothing but impoverish the US.
As time has shown, Bush made the right decision. Many nations that were signatories to Kyoto haven't even come close to meeting their greenhouse gas emission goals, with most of them seeing their emissions rise. On the other hand, the US has decreased its greenhouse gas emissions 3% since 2002 and they're still falling. With the large increase in energy prices over the past year, I would expect they'll fall off at an even greater rate.
The US has been doing what the Kyoto signatories have failed to do, and we didn't have to destroy our economy to do it. We did it our way, not by following draconian measures laid out by parties that do not have our best interests at heart.