Rep. Ryan Zinke (R-Mont.), the interior secretary nominee, acknowledged the climate is changing as a result of human activity and vowed to address health and education on Native American reservations during his Senate confirmation hearing on Tuesday.

The pledges came after Sen. Bernie Sanders (I-Vt.) asked the former Navy SEAL a series of rapid-fire questions about global warming, which has emerged as a flashpoint as President-elect Donald Trump stacks his Cabinet with fossil fuel executives and climate science deniers.

The climate is changing, thats indisputable, Zinke said. I dont believe its a hoax. I believe we should be prudent.

But Sanders abruptly cut him off when he suggested there is a lot of debate on both sides of the aisle.

Well, actually, theres not a whole lot of debate now, Sanders said. The scientific community has very truly unanimously declared that climate change is real and causing devastating problems. There is debate on this committee, but not within the scientific community.