President Obama , Chinese leader pledge to work to reduce carbon emissions . but rather an accord that covers all of the issues in the negotiations and one that has immediate operational affect . Move comes before U.N . Climate Change Conference in Denmark . China and U.S. are largest producers of greenhouse gases . Comment:
President Obama , Chinese leader pledge to work to reduce carbon emissions . Move comes before U.N . Climate Change Conference in Denmark . China and U.S. are largest producers of greenhouse gases . Comment: