We’re probably undervaluing healthy lakes and rivers

Economists often ignore the human health benefits of keeping water bodies clean

Horicon Marsh in Wisconsin

WAR ON WETLANDS  Wetlands such as Wisconsin’s Horicon Marsh (shown) are natural water purifiers. A recent legal dispute has emerged over whether to count this environmental service as a benefit of protecting wetlands.

Chumlee10/Flickr (CC BY-SA 2.0)

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