By Tony Russell

Last week the 29th anniversary of James Hansen's historic appearance before the U.S. Senate's Committee on Health & Natural Resources passed by virtually unnoticed. Hansen, a climate scientist with NASA's Goddard Institute of Space Studies, testified back on June 23, 1988, that "Global warming has reached a level such that we can ascribe with a high degree of confidence a cause and effect relationship between the greenhouse effect and observed warming."

Hansen added, ''It is already happening now.''

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