A photo of an oil pipeline.

In a bold move, Marcia McNutt, the Editor-in-Chief of Science Magazine, one of the world’s top scientific journals, endorsed the Keystone XL pipeline late February1. The controversial pipeline, designed to transport heavy crude from Canada's oil sands to US Gulf coast refiners, has been mired in controversy over its potential ecological and climate impacts. McNutt, who headed a US federal agency until 2013 and was...

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