Sept. 5, 2010 - Mono Lake, California, U.S. - This sign notes the Mono LAke water line in 1963 as years of water diversion to Los Angels caused the water lever to drop over 25 vertical feet, causing the lake's ecosystem to collapse. Mono Lake is a majestic body of water covering about 70 square miles. It is an ancient lake, over 1 million years old -- one of the oldest lakes in North America. It has no outlet and no fish; instead it is home to trillions of brine shrimp and alkali flies. (Photo by Alan Greth/ZUMA Press)
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