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Tracking Oilsands Pollution

 Researchers at Queen's University have traced air pollution dating back almost 50 years to Alberta's oilsands. Their team, which includes federal scientists from Environment Canada, has been examining sediments from lakes in northern Alberta. They've discovered hydrocarbons have increased -- in some cases, by more than 20 times pre-oilsands levels.

 Joshua Kurek is a post-doctoral fellow at Queen's University, and the lead author of the paper published yesterday. He explained his research to Joslyn:

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