Isakson not convinced of global warming crisis

Georgia Senator Johnny Isakson says he’s seen global warming first-hand, and thinks the U.S. should gradually move away from using fossil fuels. But Isakson says his trip to Greenland did not convince him more urgent steps are needed. He said he and fellow lawmakers viewed massive, melting glaciers and were briefed by U.S. and Danish scientists. But Isakson said he remains unconvinced that the current warming is a departure from long-term natural cycles.