The biggest weakness of the Kyoto protocol for dealing with the human-created emissions that are causing the decades-long rise in global temperature is that the two biggest polluters, the US and China, refused to sign it. China wouldn’t sign it largely because the US under Bush wouldn’t sign it, and the US under Bush wouldn’t sign it because the Bush Administration wasn’t just merely in bed with big industrial polluters, but actively worked for them, being oil execs and all.