Air Pollution:

Sen. Tom Carper (D-Del.) talks about growing momentum for four-pollutant bill

As members of Congress continue to debate global warming policy, legislators are also working on proposals to regulate traditional forms of air pollution. During today's OnPoint, Sen. Tom Carper (D-Del.) explains why there is new support for his power plant emissions legislation -- a proposal that would reduce mercury, sulfur dioxide and nitrogen oxide emissions, along with greenhouse gases. Carper also discusses the role climate change policy could play in the 2008 presidential election, and addresses how a faceoff between Sen. John McCain (R-Ariz.) and Sen. Hillary Rodham Clinton (D-N.Y.) might bring the issue to the forefront.