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Under a Green Sky

Global Warming, the Mass Extinctions of the Past, and What They Can Tell Us About Our Future
Title rated 2.75 out of 5 stars, based on 2 ratings
Current format, Book, 2007, Available .
Current format, Book, 2007, Available . Offered in 0 more formats
More than 200 million years ago, a cataclysm known as the Permian extinction destroyed nearly 97 percent of all living things. Its origins have long been a puzzle. Paleontologist Ward, fresh from helping prove that an asteroid had killed the dinosaurs, turned to the Permian problem, and he has come to a stunning conclusion:…

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