The Kyoto Pact takes effect today. Without us. In some ways, it's more symbolic than anything. Sans our involvement, it'll barely make a dent in global carbon dioxide emissions. But our opposition neither killed nor derailed it, and that in itself was meant to send a message.
It's worth noting that, in this too, Bush was for it before he voted against it:
Bush, who campaigned before his first term on the promise that he would regulate carbon dioxide emissions from power plants, changed his mind after taking office and withdrew from the Kyoto talks in 2001, advocating voluntary steps to reduce greenhouse gases.