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Ecological research and conservation is literally valuable.

John Yeiser

Costanza et al (1997) assign monetary values to ecosystem services provided by mother nature. While the entire manuscript may be hard to get through, the take home message is summarized by the following: "We estimated that at the current margin, ecosystems provide at least US$33 trillion dollars worth of services annually." So the next time someone argues that they shouldn't have to care about ____ habitat all the way in ____, please refer to this publication.

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