“Santa Cruz Sentinel 07 Dec 1989, Thu -Page 14

Hansen spurred controversy when he told a U.S. Senate committee during the hot, dry summer of 1988 that he was almost certain greenhouse warming already was under way. Other scientists said if that’s true, they can’t detect such warming since it is so small compared with temperature variations caused by changes in solar heat output and other natural factors.”

07 Dec 1989, Page 14 – Santa Cruz Sentinel at Newspapers.com