NASA Administrator Jim Bridenstine, who after taking the helm of the science-focused agency shifted his previous views on climate change, reaffirmed that evolution on a weather-focused podcast earlier this week.

“I know that I know that carbon dioxide is a greenhouse gas and that we’ve put more in the atmosphere than at any other point in human history and because of that, the temperatures are warmer today than they would be otherwise and we are responsible,” Bridenstine said on The Weather Channel’s Weather Geeks podcast. “I have no reason to doubt the science.”

In May after his confirmation, Bridenstine said he “fully believe[s] and know[s] that the climate is changing…[and] humans beings are contributing to it in a major way.”