Many scientists say immediate action it needed to stop global warming. But some economists argue that the benefits of any realistic solution aren't worth the cost. Can we afford to stop global warming?
Jonah Goldberg, Los Angeles columnist and contributing editor to National Review
Barry Rabe, professor at The Gerald Ford School of Public Policy, University of Michigan, and senior fellow at the Brookings Institution
Dan Kammen, director of the Berkeley institute of the Environment and the founding director of the Renewable and Appropriate Energy Laboratory at Berkeley