The latest news on Kyoto Protocol
Canada's environment minister said his country is pulling out of the Kyoto Protocol on climate change.
From 1997 to 2008, world CO2 emissions from the burning of fossil fuels increased 31 percent.
With major climate talks in Copenhagen looming, a UN report tallies Kyoto's achievements.
Check out the debate in the latest issue of U.S. News Weekly.
A key United Nations official calls for more political engagement in global effort to reduce emissions.