“Carbon dioxide is slowing turning our planet into an uninhabitable wasteland, and half the population doesn’t believe it,” he said.
And while his message may have been a bit depressing, he delivered it with a big smile on his face.
Jeffries then asked Pitt, 53, for his forecast, which turned out to be even more morbid.
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“The Lord saw the wickedness of man was great, and the Lord said, ‘I will destroy man, who I have created, from the face of the Earth.’ So don’t forget your sunscreen,” Pitt said with another grin.
The actor previously appeared on the comedian’s new late night news program last week, where he joked there was “no future” in the wake of Donald Trump withdrawing from the Paris Accord.