In July, the climate grassroots group 350 Action asked Hillary Clinton at a campaign stop in New Hampshire for her position on banning fossil fuel development on public lands. Clinton gave what she deemed a “responsible answer” that she wouldn’t accept a ban until we get “the alternatives in place.” I asked her campaign chair John Podesta the same question in October, and he only suggested a willingness to use “policy levers” to affect fossil fuel production.

Now, Clinton is ready to take a more definitive stand on limiting fossil fuel extraction on federal lands—which has emerged as a top priority for climate organizers after their victory against the Keystone XL pipeline. Griffin Sinclair-Wingate, a 350 Action organizer, approached Clinton after the New Hampshire debate on Thursday night and asked her, “Would you ban extraction on public lands?”

“Yeah, that’s a done deal,” Clinton said, as though her position were obvious. Afterward, she told another 350 activist that she agrees with “where the president is moving. No future extraction.” Adam Greenberg asked her in a third video on Friday while campaigning in New Hampshire, “Would you end all oil, coal, and gas leases on federal lands?” Clinton said, “I want to impose a moratorium ... because there are legal issues you have to go through, you know all of that, but I would support a moratorium.”

Clinton doesn’t appear to be endorsing anything too radical, or so far beyond what President Barack Obama has already started. In order for the U.S. to deliver on its promises in the Paris climate agreement, the next administration will have to take additional steps to limit the demand and supply of fossil fuels, even if the agreement itself was vague on the details. Scientists and activists insist that any meaningful curb on climate change must keep coal, oil, and gas reserves in the ground. One encouraging sign was the president’s recent announcement to impose a three-year moratorium on leasing public lands for coal development, allowing the Department of Interior time to reform how it leases lands for extraction.

Clinton’s comments only show that she supports that moratorium, and that she might support expanding it to oil and gas leases. Yet her position still represents a tectonic shift in the Democratic Party on policies that were once a long-shot wish of climate activists.