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Well, maybe not just quite yet, but a study to be released in the near future is expected to report that greenhouse gases "pose a danger to human health and the environment", which would be the first step to limiting emissions, and lead to a (hopefully) more fruitful climate summit in Copenhagen.

[1] http://greeninc.blogs.nytimes.com/2009/12/07/epa-sets-carbon-crackdown/