From The Energy Daily (Free Access)
Staking out an aggressive position on a key issue in the global warming debate, President-elect Barack Obama called Tuesday for returning U.S. greenhouse gas emissions to 1990 levels by 2020—a reduction of 20 to 30 percent, according to federal estimates of likely emissions growth over the next dozen years—and then cutting emissions an additional 80 percent below 1990 levels by 2050.

http://www.theenergydaily.com/publications/cleanenergyupdate/