Commentary: Top 10 conservation achievements of the 20th century

Without question, the 20th century stands as the most transformative era in the history of North American conservation. At its beginning, wildlife populations were collapsing, forests were vanishing, and the unregulated exploitation of natural resources were the rule, not the exception.
By its end, however, many game and non-game species had recovered, important and unique landscapes were protected, and conservation had become a defining public value.

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