Overgrazing

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In ecology and  agriculture, overgrazing occurs when plants are  exposed to grazing for too long, or  without sufficient recovery periods. it  reduces the usefulness of the land and  is one cause of desertification and  erosion. Overgrazing is  also seen as one cause of the spread of non-native plants.

Overgrazing is  used as the canonical example of the Tragedy of the commons.

See the following countries:

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STATIC WIKIPEDIA JUNE 2008 on wikipedia2006.classicistranieri.com

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