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Canadian Oil Sands: Life-Cycle Assessments of Greenhouse Gas Emissions

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CRS – Canadian Oil Sands: Life-Cycle Assessments of Greenhouse Gas Emissions. Richard K. Lattanzio, Analyst in Environmental Policy, May 15, 201s

  • “Recent congressional interest in U.S. energy policy has focused in part on ways through which the United States could secure more economical and reliable crude oil resources both domestically and internationally. Many forecasters identify petroleum refined from Canadian oil sands as one possible solution. Increased petroleum production from Canadian oil sands, however, is not without controversy, as many have expressed concern over the potential
    environmental impacts. These impacts may include increased water and natural gas use, disturbance of mined land, effects on wildlife and water quality, trans-boundary air pollution, and emissions of greenhouse gases (GHG) during extraction and processing. A number of key studies in recent literature have expressed findings that GHG emissions from the production of Canadian oil sands crudes may be higher than those of other crudes imported, refined, and consumed in the United States. The studies identify two main reasons for the increase: (1) oil sands are heavier and more viscous than lighter crude oil types on average, and thus require more energy- and resource intensive activities to extract; and (2) oil sands are compositionally deficient in hydrogen, and have a higher carbon, sulfur, and heavy metal content than lighter crude oil types on average, and thus require more processing to yield consumable fuels.”
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