See here.  This will infuriate many environmentalists, and further outrage Democrats who are already outraged by potential extension of the Bush-era tax cuts.  The money quote from the NY Times Green Blog:

“Environmental advocates are furious. They fear a similar delay on the approaching start of one of the most far-reaching regulatory programs in American environmental history, the effort to curb emissions of carbon dioxide and other greenhouse gases.  But in a striking turnabout, the National Association of Manufacturers and the American Petroleum Institute — which have been anything but friendly to Mr. Obama — are praising his administration.”