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Previous studies have vastly underestimated the carbon footprint of the Canadian oil sands by not considering the industry's impact on peatlands, according to new research. [More]

By Timothy Gardner and Ayesha Rascoe WASHINGTON (Reuters) - The U.S. Environmental Protection Agency raised new concerns about TransCanada Corp's proposed $7 billion Keystone XL pipeline that would bring oil sands crude from Canada to refineries in Texas. [More]