Seeing Green: Urban Trees Worth Billions

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Seeing Green: Urban Trees Worth Billions

<img alt="" src="http://media-1.web.britannica.com/eb-media/64/154264-004-B25A0481.jpg" width="270" height="178" align="right" />What are America's urban trees and forests worth? A recent study suggests that when it comes to carbon storage and sequestration, their economic value soars to more than $50 billion.

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