Grand Canyon flooded to improve ecosystem

U.S. officials released a flood into the Grand Canyon to try to undo damage caused by the construction of the Glen Canyon Dam in the 1960s.

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<p><a href="http://www.physorg.com/news123955553.html">Grand Canyon flooded to improve ecosystem</a></p> <p>U.S. officials released a flood into the Grand Canyon to try to undo damage caused by the construction of the Glen Canyon Dam in the 1960s. </p>