Here's another university scientist who refutes the hypothesis of human-caused global warming. I don't know for certain which side is correct, but I certainly propose an end to name-calling, which includes declaring that any scientist with a particular view is a "petro company lacky" or "enviornmental wacko".
"I was accused by Canadian environmentalist David Suzuki of being paid by oil companies. That is a lie. Apparently he thinks if the fossil fuel companies pay you have an agenda. So if Greenpeace, Sierra Club or governments pay there is no agenda and only truth and enlightenment?"