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Stanford's Jon Krosnick discusses Americans' perception of climate change, policy

A recent Washington Post/ABC News/Stanford University poll shows the number of Americans concerned about climate change is on the rise, and a large number of Americans would support the government taking steps to encourage businesses to be more efficient. During today's OnPoint, Stanford University professor Jon Krosnick discusses the study and its implications. Krosnick explains why most Americans believe there is disagreement among scientists about global warming. He also discusses how Americans' perception of climate change should play into the 2008 presidential election.