Measures needed to reduce the human contribution to global warming, a contribution whose existence seems to be debatable, appear to be the same ones needed to clean up our air, the deterioration of which isn't so much in question. Those measures are, of course, centered on converting from fossil fuels to renewable energy sources -- a step that significantly would also reduce U.S. dependence on enemy nations for its fuel. So rather than haggling over the warming, let's figure out how to get this country interested in converting to renewable energy.