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http://en.wikipedia.org/wiki/Nuclear_winter
Cornell Professor Carl Sagan, of the TTAPS study, predicted on ABC's Nightline that the smoky oil fires could cause a worldwide ecological disaster of black clouds resulting in global cooling. Retired atmospheric physicist and climate change skeptic Fred Singer dismissed Sagan's prediction as nonsense, predicting that the smoke would dissipate in a matter of days. In his book The Demon-Haunted World, Sagan gave a list of errors he had made (including his predictions about the effects of the Kuwaiti oil fires) as an example of how science is a learning process.