Gray, Masliyah, and Xu reply: Readers who are interested in the environmental impact of energy supply need to ensure that they consider accurate information, and avoid the kind of hyperbole presented in the above letter. On the specific issue of the Canadian oil sands, readers are encouraged to examine the recent impartial report from the Royal Society of Canada, which details the shortcomings of government regulation, the need for the oil industry to improve its practices, and the exaggerated claims of environmental groups.1
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