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State Department issues Draft Supplemental Environmental Impact Statement on Keystone XL Pipeline: climate change impacts

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Despite the wide variation in design, inputs, and assumptions within the LCA studies reviewed, the DOS SEIS identified several key findings, “ clearly supported by the LCA results ”: % change in near-term WTW weighted-average GHG emissions from the mix of WCSB oil sands crudes that may be transported in the pipeline relative to reference crudes.