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Tagged: carbon-intensity

Energy & Climate

Part 4: Monterey Shale: Twice as polluting as Keystone XL?

Much of California’s current petroleum output is categorized as heavy or extra-heavy oil, meaning it is more viscous and requires more energy and time to refine into fuel than lighter grades of crude. In many ways, it is similar to the thick “bitumen” petroleum that comprises Alberta’s tar sands.