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9 ancient man-made environmental catastrophes

By: Bryan Nelson on Nov. 25, 2009, 8:38 a.m.
Collapse of the Anasazi Civilization

Photo: shell game/Flickr

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Collapse of the Anasazi civilization

Like so many other civilizations and cultures, the Anasazi fell victim to environmental pressures. Overpopulation put a severe strain on scant water resources in the American Southwest, where the Anasazi lived. The problem was exacerbated by a period of extreme drought, which the Anasazi became incapable of managing because of overstretched agricultural irrigation technology.