Reuters: China and the United States took a major step in the fight against climate change over the weekend, but what was termed a "breakthrough" might not do much in the longer term to lock in legally binding carbon emission cuts from the world's two biggest emitters of greenhouse gases.
Still, environmental groups and some U.S. and global policymakers said the agreement could give fresh momentum to the United Nations' arduous process of finalizing a global treaty to replace the Kyoto Protocol on climate...