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Letter to American Physical Society about man-made global warming

Hal Lewis, Fred Singer, William Happer, Larry Gould, Roger Cohen, Robert Austin
SEPP - The Science and Environmental Policy Project, American Physical Society
Bicycle path in Croatia. Beautiful nature as a result of carbon dioxide in the atmosphere.

November 19, 2009. Robert H. Austin, Princeton University, Corresponding Author: Over 160 highly qualified scientists request that the APS change wording about climate change. Greenhouse gas emissions accompany human industrial and agricultural activity. While substantial concern has been expressed that emissions may cause significant climate change, measured or reconstructed temperature records indicate that 20th 21st century changes are neither exceptional nor persistent, and the historical and geological records show many periods warmer than today.