Oil Sands Pollution 2 to 3 times worse than thought

The amount of harmful pollutants released in the process of recovering oil from tar sands in western Canada is likely far higher than corporate interests say, university researchers said Monday. 

Actual levels of polycyclic aromatic hydrocarbon (PAH) emissions into the air may be two to three times higher than estimated, said the findings in the Proceedings of the National Academy of Sciences, a peer-reviewed US journal.

The study raises new questions about the accuracy of environmental impact assessments on the tar sands,
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