Christopher C. Horner is an attorney in Washington, D.C. and a Senior Fellow at the non-profit libertarian think tank Competitive Enterprise Institute. He opposes the mainstream view of climate change, and has been prominent in promoting climate change denial. He is the author of three books disputing the scientific evidence for man-made global warming. He was supported by coal companies. Horner has been criticized for hounding climate scientists with allegedly frivolous requests for documentation and emails.