Rising sea levels torment Norfolk, Va., and coastal U.S.

Climate skeptics don't buy the global projections. "We don't know how much sea levels will rise or fall," says Myron Ebell, director of the Center for Energy and Environment at the Competitive Enterprise Institute, a libertarian research group funded partly by fossil fuel interests. He says models can't reliably predict the climate, because its changes are "non-linear" or irregular, so flood walls and other measures might waste money.