The U.S. joined Saudi Arabia, Russia and Kuwait in blocking the incorporation of a key scientific study into global climate talks in Poland. The Intergovernmental Panel on Climate Change, in a landmark report released in October, warned of the dire effects of a global average temperature rise of 1.5 Celsius, and outlined ways to avoid it.

On Saturday, the four major oil and gas producing nations acted together to block endorsement of the study, which was commissioned at the 2015 United Nations Climate Change Conference in Paris.

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“I think it was a key moment,” Alden Meyer of the Union of Concerned Scientists, told The Associated Press. “The fact that a group of four countries were trying…