Assuming that it's happening, I"m not sure that I'd leave it up to the government to try to stop it, or handle it's effects. Check out the below links for the libertarian perspective (on how to handle the consequences, not deny that it's happening)
LP News January 1999 - Libertarian Solutions: Non-governmental solutions to the "problem" of global warming Reason Foundation - Reason Roundtable: Global Warming
Stephen
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