Wednesday, September 09, 2015

'Clean' energy not alway so clean

As an example of unexpected and unintended consequences, it has been shown that impoundments for hydroelectric power actually increase the amount of mercury in the biosphere.  At certain depths, microorganisms convert a non-toxic form of available mercury into a form than is readily absorbed by the biosphere. As a result, biologically active mercury levels are higher below dams than above them.

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