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Why the Keystone XL Pipeline Project Is So Controversial

Proposed Keystone XL Pipeline To Run From Canada To Gulf Of Mexico

Photographer: Andrew Burton/Getty Images

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TransCanada Corp.’s long-delayed Keystone XL is an $8 billion project to construct an oil pipeline that connects Alberta in Canada to the U.S.’s Gulf Coast refineries. It’s faced years of objections from environmentalists but was eventually approved by U.S. President Donald Trump. The project has now hit another roadblock, in the U.S. courts.

The Keystone XL pipeline would span 1,179 miles (1,897 kilometers) from Alberta through three states -- Montana, South Dakota, and Nebraska -- before connecting to an existing network feeding crude to the Gulf Coast. The line would carry as much as 830,000 barrels of oil a day.