Following the nationwide protests in the wake of President Trump’s inauguration—and NASA’s official announcement that 2016 was the warmest year on record—today students across the country walked out of class to resist Trump’s regressive statements on climate change and called on their universities to divest from fossil fuels.

The Fossil Fuel Divestment Student Network and 350.org teamed up to dub the endeavor #ResistRejectDenial. Together, they urged students across the country—from North Carolina’s Appalachian State University to the University of Denver, and from Northern Arizona University to Harvard University—to hold walkouts, teach-ins, and other actions. Thirty middle-schoolers in Eugene, Oregon, also took part. 

Trump has called climate change a “hoax” created by the Chinese. He’s threatened to roll back climate protections instituted under President Obama, and during his campaign promised to “cancel” the Paris climate agreement (post-election, in an interview with the New York Times, Trump said he’d “take a look at” the agreement).

“We are walking out of our classrooms because our universities can no longer continue to back the coal, oil, and natural gas companies who are celebrating Trump’s victory and committing the globe to extreme levels of warming and disaster,” reads the Divestment Student Network’s website. “The era of Trump must be one of resistance and noncompliance.”

College student Stephen O’Hanlon describes an energetic scene at Swarthmore College, where he says 150 students and faculty walked out of classes today. They participated in a teach-in, during which professors and students discussed the environmental and societal implications of Trump’s climate views. O’Hanlon, who co-coordinates Swarthmore Mountain Justice and helped organize today’s nationwide protests, says, “The speakers brought together the combination of energy and hope in the power of organizing, as well as a groundedness and urgency, knowing the stakes we’re up against.”

O’Hanlon adds that more than 100 Swarthmore alumni emailed the college today to urge divestment from fossil fuels. “The clearest way for Swarthmore College to show leadership on climate justice . . . is for us to remove our financial support from the fossil fuel industry,” he says.

Trump’s pick to lead the Environmental Protection Agency, Scott Pruitt, sued the EPA 14 times as Oklahoma’s attorney general. Rex Tillerson—who the Senate Foreign Relations Committee is expected to confirm this afternoon as secretary of state—is the former CEO of oil and gas giant ExxonMobil.

“It’s not the Rex Tillersons and Donald Trumps of the world who will face the brunt of Trump’s disastrous climate policies” says O’Hanlon. “It’s people of color—working-class people.”

Greta Neubauer, director of the Divestment Student Network, reports that thus far, 25 schools have staged walkouts, and more than 1,000 students have taken part.

This article will be updated as the story develops.