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Poll: Fewer believe in global warming

From NBC's Ali Weinberg
Even as major climate change legislation moves through Congress, fewer voters believe global warming is a very serious problem -- or even think there is solid evidence of it -- a new Pew Research survey finds. And action on the environment has slipped even further down voters' lists of policy priorities for the president, although a majority would not oppose regulations limiting carbon emissions.
According to the poll, 35% of respondents said global warming was a serious problem, down from 44% in April 2008. Even starker is the increase in voters' skepticism: Only 57% said they believe there is solid evidence that earth's average temperature has increased over the past few decades, compared with 71% who said that last year -- a 14-point drop. Also, just 36% said increases in global temperatures are the result of human activity, which was down from 47% last year.
Along political lines, global warming was the lowest-rated priority for both independents and Republicans, and was 16th among Democrats out of 20 issues.
Still, despite voters' ambivalence about climate change, 50% said they would support a policy setting limits on carbon emissions, versus 39% who say they would oppose it.