Ex-Astronaut: says that global warming is bunk

Harrison Schmitt, a man who walked on the moon and a trained geologist is one former astronaut the thinks there is no evidence to back up global warming. Back in 1972 Harrison Schmitt, was the last man to walk on the moon. He claims that most men of science are scare. They know that CO2 is not the reason for global warming, but that afraid to tell the truth.