Producing fuel from Canada oil sands emits more carbon than from US crude

The production of petroleum from Canada's oil sands is on the rise with much of it destined for U.S. refineries. As the U.S. takes stock of its greenhouse gas emissions, scientists report in the ACS journal Environmental Science & Technology that the current oil sands production of fuels from "well-to-wheels" releases about 20 percent more carbon dioxide into the atmosphere than making gasoline and diesel from conventional crudes.

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