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Click here to visit the new home of Politics Daily!A smaller number than previously measured attribute global warming to human activity. Forty-seven percent cited human activity in 2008 compared to 36 percent now.
Along partisan lines, Democrats who believe there is solid evidence for climate change dropped from 83 percent to 75 percent, independents from 75 percent to 53 percent and Republicans from 49 percent to 35 percent.
However, the public still supports putting limits on carbon emissions through a "cap and trade," which would allow companies that exceed emission allowances to buy credits from lower-polluting companies. Fifty percent favor such a policy compared to 39 percent who oppose it, with 11 percent undecided.
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