A national survey carried out earlier this month found 57% of people say yes, there is solid evidence the earth is warming compared to 71% who said yes in an April 2008 survey. That 14 percentage point decline comes after surveys in 2006, 2007 and 2008 found a steady and widely held view that the climate was warming.

Of those who believe the earth’s temperature is rising today, fewer now blame human activity for climate change (36%) than did in the April survey (47%).

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