Oil Sands Safety Questions Remain With Few Answers

11/02/2011 03:48 pm ET | Updated Jan 02, 2012

The Canadian crude oil that would flow through the Keystone XL pipeline is either the lynchpin of U.S. energy security or the path to certain environmental destruction, depending on whom you talk to. Advocates say there is no evidence that it is any more harmful than other types of oil; critics say there is insufficient evidence that it is safe. There is little information to support either side.

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