Prior to the pro-science marches on Earth Day, Bill Nye participated in a CNN panel about climate change. The discussion was kicked off by Princeton physics professor William Happer, a climate change skeptic and science adviser to Donald Trump. 

Nye was next up and he didn’t mince words about the inclusion of a panelist that represented only 2-3% of scientists that deny climate change exists and is due to human activity. “I will say, much as I love the CNN, you’re doing a disservice by having one climate change skeptic, and not 97 or 98 scientists or engineers concerned about climate change.” He then went on to say, “the science march today is about the economy as well as the environment,” and noted the U.S. Constitution refers to “progress of science and the useful arts.” He argued that suppressing science would only put the U.S. economically behind.

Nye later observed that science is political and drives how money is invested before he told Happer, “So sir, with some respect, I encourage you to cut this out so that we can all move forward and make the United States a world leader in technology,” by embracing alternative energy. Nye pointed out the U.S. could create at least 3 million new jobs that couldn’t be outsourced and our technology could be exported.

It was then that the interview took a strange turn. The host, Victor Blackwell, asked Happer about the 2016 Paris Agreement. Happer called the agreement “silly” and compared it to Neville Chamberlain’s appeasement to Adolph Hitler.

Blackwell retorted, “How is that an appropriate comparison?”

“It is an appropriate comparison because it was a treaty that was not going to do any good,” Happer said.

Nye shook his head. “It will not make any difference and yet it will cause enormous harm to many people.”