As reported by the Washington Post
“President Bush has consistently called for the development of advanced technology to help meet the country’s energy needs and cut global-warming pollution without imposing a mandatory cap on emissions. ”

Not content with disagreeing that any form of limits should be placed, they don’t even accept the UN as a platform:

The United States also remains opposed to a statement that reads, “We acknowledge that the U.N. climate process is an appropriate forum for negotiating future global action on climate change.”