Senate to take up climate bill

In this July 10, 2007 file photos, the coal-fired Plant Schereris in operation at Juliette, Ga. Plant Scherer has for several years been the nation's single largest source of carbon dioxide, which most scientists believe contributes to global warming. The economic cost of confronting global warming - from higher electricity bills to more expensive gasoline - is driving the debate as climate change takes center stage in Congress. The Senate begins considering legislation Monday that for the first time would mandate a reduction in carbon dioxide and other greenhouse gases from power plants, refineries, factories and transportation, in hopes of cutting heat-trapping pollution by two-thirds by mid-century. (AP Photo/Gene Blythe)

(AP) -- Most senators acknowledge that climate change poses a major environmental threat, but getting agreement on how to deal with it is another matter.