The number: 57% — Global warming

The percentage of Americans who say there is solid evidence the Earth is warming has fallen sharply over the last year. In an April 2008 survey, 71% said there was solid evidence of global warming, and almost half of Americans (47%) said it was the result of human activity. In an October survey, however, just 57% of Americans said there was solid global warming evidence, and only 36% of the public said it was the result of human activity. Even among Democrats, the percentage seeing strong evidence of global warming has fallen from 91% in 2006 to 71% in 2009. Republicans have always been more cynical about global warming evidence, but doubters have mounted quickly in recent years, after a very slight increase in support of global warming evidence in 2007. Fully 62% of Republicans said there is solid evidence the Earth is warming in 2007, but currently just slightly more than a third (35%) agree.