According to Pew Research Center for the People & the Press, there has been a sharp decline over the past year in the percentage of Americans who say there is solid evidence that global temperatures are rising. And fewer also see global warming as a very serious problem -- 35% say that today, down from 44% in April 2008.

57% think there is solid evidence that the average temperature on earth has been getting warmer over the past few decades. In April 2008, 71% said there was solid evidence of rising global temperatures.
The decline in the belief in solid evidence of global warming has come across the political spectrum, but has been particularly pronounced among independents. Just 53% of independents now see solid evidence of global warming, compared with 75% who did so in April 2008. Republicans, who already were highly skeptical of the evidence of global warming, have become even more so: just 35% of Republicans now see solid evidence of rising global temperatures, down from 49% in 2008 and 62% in 2007. Fewer Democrats also express this view -- 75% today compared with 83% last year.

With less than two months before the United Nations Climate Change Conference in Copenhagen, a majority (56%) of Americans think the United States should join other countries in setting standards to address global climate change while 32% say that the United States should set its own standards.

Read the whole report here.