July 29th, 2010
Congress debates it. Nations argue about how to address it. But its existence is â€śunmistakableâ€ť according to the 2009 State of the Climate report released Wednesday.
Global warming is happening.
State of the Climate, which drew on work by 300 scientists in 160 research groups in 48 countries, confirms that the past decade of 2000-2009 was the warmest on record, and that Earth has been growing warmer over the past 50 years.
The research groups looked at 10 indicators, and confirmed that seven are going up, making the world slightly, but significantly warmer.