Environmental Health Perspectives (EHP) is a monthly journal of peer-reviewed research and news on the impact of the environment on human health. EHP is published by the National Institute of Environmental Health Sciences and its content is free online. Print issues are available by paid subscription.DISCLAIMER
On p. A155 of the April Focus article [Environ Health Perspect 117:A150–A156 (2009)], a statement reads, “The primary global impact of oil sands comes through the release of greenhouse gases created when about 800 million cubic feet of natural gas (approximately 10% of Canada’s total natural gas consumption) is burned daily to create heat for extraction and upgrading, says Stringham.” To clarify: This statement refers to the global impact of oil sands production. As noted in the preceding paragraph of the article, most of the greenhouse gas emissions related to oil sands overall come from burning the fuel derived from these reserves.