Canadian oil sands: Defusing the carbon bomb

Nature: Environmentalists and many politicians have called the oil sands a planetary-scale threat as they fight to prevent further development of the resource. Andrew Weaver and Neil Swart, both climate scientists at the University of Victoria in British Columbia, listened to the rhetoric and decided to run some calculations. Because of the energy-intensive process for producing oil from this region, it is true that greenhouse gas emissions are higher than average. But their work underscores evidence that......

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