Roger Pielke, a professor of environmental studies at the University of Colorado, and six others are under investigation by Congress regarding testimony they've given on the subject of climate change.Pielke, a believer in man-caused global warming, can't quite figure out why he's the object of a witch hunt....................... What am I accused of that prompts being investigated? Here is my crime: Prof. Roger Pielke, Jr., at CU’s Center for Science and Technology Policy Research has testified numerous times before the U.S. Congress on climate change and its economic impacts. His 2013 Senate testimony featured the claim, often repeated, that it...