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Huge Ponds Hold Tar Sands Sludge, and Great Risks (Op-Ed)Opinion Every day, 6.6 million gallons of tar-sands mining waste head to huge ponds in Canada — and yet no one has a good handle on how well those ponds are contained.
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Blowout Raises Questions About Tar-Sands Oil (Op-Ed)Opinion An oil spill in Alberta, kept under wraps for months, is raising questions about oversight of tar-sands oil drilling.
Opinion
