While there have been many prominent scientists who have stepped forward voicing criticism of global warming science, few have garnered attention like that of meteorologist John Coleman, founder of the Weather Channel. Commenting before the San Francisco Chamber of Commerce, Coleman stated his belief that “there is no significant man-made global warming” taking place. He went on to say that “the climate of the Earth is changing” and that it “has always changed,” but that mankind’s activities have not overwhelmed or significantly modified natural forces.” He credited much of the stir about global warming to media hype, and cautioned about taking expensive actions to curb greenhouse gases because they would undoubtedly harm the economy.