Associated Press: Don't expect the landmark U.S.-China climate change agreement to nudge the world's rising thermostat downward much on its own, scientists say.
While they hail it as a start, experts who study heat-trapping carbon dioxide don't see the deal, announced Wednesday in Beijing, making significant progress without other countries joining in.
The math shows that even with the agreement, the globe is still rushing toward another 2-degree temperature rise -- a level that world leaders have pledged to...