Flashback 1970: Earth Day Prof. Predicted A Super Ice Age Would Engulf The World
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“The world has been chilling sharply for about twenty years,” ecologist Kenneth Watt told an audience at Swarthmore College on April 19, 1970 around the time of the first Earth Day demonstrations.
“If present trends continue, the world will be about four degrees colder for the global mean temperature in 1990, but eleven degrees colder in the year 2000,” Watt declared. “This is about twice what it would take to put us into an ice age.”