The study found that the crude proposed for the Keystone XL pipeline posed no increased risks of transport, but environmental groups said its possible environmental hazards required scrutiny. Continue reading here:  Scientists Find Canadian Oil Safe for Pipelines, but Critics Say Questions Remain ; ;Related ArticlesBP Challenges Settlements in Gulf Oil SpillAlgae-Engineering Joint Venture DisbandsNews Analysis: Clean Air Act, Reinterpreted, Would Focus on Flexibility and State-Level Efforts ;

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Scientists Find Canadian Oil Safe for Pipelines, but Critics Say Questions Remain