About 35 percent of Americans see global warming as a very serious problem, down from about 44 percent in April of 2008, according to a new consumer survey from the Pew Research Center for the People & the Press.

About 57 percent of the 1,500 adults surveyed from Sept. 30 through Oct. 4 think there is solid evidence that the Earth is getting warmer, compared to 71 percent who said that in April of 2008.

Only 36 percent attribute global warming to human activity, compared to 47 percent in April 2008.

The decline is evident across party lines, as evidenced in the chart to the left.

Despite the decline in global warming believers, there remains more support for cap-and-trade policies on carbon emissions. Half of respondents favor cap-and-trade, while 39 percent oppose it.