Associated Press: In the more than two decades since world leaders first got together to try to solve global warming, life on Earth has changed, not just the climate. It's gotten hotter, more polluted with heat-trapping gases, more crowded and just downright wilder.
U.S. and China reach historic climate change agreement Obama urges world to follow U.S. lead on climate change
The numbers are stark. Carbon dioxide emissions: up 60 percent. Global temperature: up six-tenths of a degree Fahrenheit. Population: up...