Report rebuts a concern about Keystone XL tar-sands oil

Tar-sands oil for the Keystone XL pipeline is no more likely to cause leaks than other types, a new study finds.WASHINGTON — The type of crude oil that would be pumped through the Keystone XL pipeline is no more likely to corrode pipelines or heighten the chance of leaks than other kinds of petroleum, according to a study by the National Research Council, an arm of the National Academy of Sciences and the National Academy of Engineering.

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