Speaking last week in Pittsburgh, President Donald Trump all but confirmed that the U.S. was withdrawing from the 2015 Paris climate change agreement.

“The Paris accord would have been shutting down American producers with excessive regulatory restrictions like you would not believe, while allowing foreign producers to pollute with impunity,” he said, adding: “What we won’t do is punish the American people while enriching foreign polluters. I’m proud to say it, it’s called America First.”