How Severe An Impact Would The Keystone XL Pipeline Have On The Environment?

Last month, a group of 15 climate scientists (included the now disgraced Peter Gleick) sent a letter to Congress expressing their displeasure over the proposed Keystone XL Pipeline. President Obama has weighed in against approval, but Congress wants a green light to allow construction of the 1,700-mile, $7 billion project. Most recently, Bill Clinton weighed in for the pipeline, indicating just how deep the positives of the project are for the U.S. and world oil market. So why are physical scientists getting political about a market-friendly pipeline…

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