Roberts, who penned the forward to Project 2025, seemed an unlikely guest, but as he put it, “I’ll go anywhere to talk about how the climate agenda is ending the American Dream.” He seized the speaking opportunity to dismiss climate science and argue that it was the climate agenda—not climate change itself—that should most concern people.

Kevin D. Roberts, president of the Heritage Foundation, which published a policy blueprint for the next Republican administration known as Project 2025, on Wednesday dismissed the overwhelming scientific consensus that humans were warming the planet.