President Trump is facing criticism after he again attacked windmills during a speech in West Palm Beach, Florida, Saturday.

President Donald Trump: “I know windmills very much. I’ve studied it better than anybody I know. It’s very expensive. They’re made in China and Germany mostly; very few made here, almost none. But they’re manufactured. Tremendous — if you’re into this — tremendous fumes, gases are spewing into the atmosphere. You know we have a world, right? So, the world is tiny compared to the universe. So, tremendous, tremendous amount of fumes and everything. You talk — you talk about the carbon footprint. Fumes are spewing into the air, right? Spewing.”

In fact, the Energy Department says wind power has the smallest carbon footprint of any energy source, responsible for 20 times less greenhouse gas per kilowatt-hour than coal-powered electricity. One scientific report concluded that “wind turbines produce energy with virtually no emissions.”