The science of climate change and the evidence of its devastating impact, not just in the U.S. but around the world, could not be more clear.

While past generations have fought to make change in this area, none has felt the urgency of the current youth. On Saturday, July 21, Zero Hour — a group founded by high school students — will lead the largest climate mobilization effort by youth of color in Washington, D.C.

“There is no more time,” says Kibiriti Majuto, 20, a core Zero Hour member and author of their platform who is from the Congo. “We do this now or we’re done.”

Founding member Nadia Nazar, 16, echoes his sentiment: “We only have a little time left until there is no hope to solve this problem,” she told Teen Vogue.

Zanagee Artis, Zero Hour’s logistics head, acknowledges that certain communities have been working on this problem for generations: “We definitely recognize that frontline communities and indigenous peoples have been fighting climate change and fossil fuel projects for a long time.”

“But we know that isn’t enough,” 18-year-old Zanagee told Teen Vogue. “For decades the mainstream climate movement has appealed to people who are already invested in environmental justice.” One of Zero Hour’s goals is to broaden the base of support for climate justice so that people understand the social consequences of the issue as well.

“Our movement proves that despite not being able to vote we can still have an impact on the government that is endangering our future,” Zanagee said. “We’ve run out of time to wait for our elected officials to handle the climate crisis that my generation will inherit — we need to make change to survive.”

Ahead of the march on Saturday, a series of climate mobilization events will rally youth from across the world. On Thursday, July 19, Zero Hour organizers will meet with Congress to lobby for change. If you’re in D.C., you can join this effort. (RSVP here).

Friday, July 20, is the day of the Youth Climate Art Festival, headed by Nadia, where people can experience art and music combined with climate actions. This will include giant Parachutes for the Planet displays from around the planet, on-site poster making, art exhibits, musical performances, and Zero Hour organizers engaging with the public on climate justice. The festival will take place in Dupont Circle from 5:30 to 8:00 p.m.

Performers at the festival include Xiuhtezcatl Martinez, a hip-hop artist and plaintiff in landmark youth climate lawsuit; Arielle Martinez Cohen, a 16-year-old singer/songwriter; and the Young Women's Drumming Empowerment Program, an enrichment and empowerment group for urban teen girls.

Then on Saturday, July 21, the main event: the Youth Climate March. “The rally starts at 10:30 a.m. and will be filled with only youth, 25 and under,” said Nadia. “These youth will be speaking about their personal stories on how climate change has affected their life. We want to show people that climate change is happening right now, and we want to inspire a wave of youth to go back to their local community and take action.”

Speakers and performers include Native American youth Sebi Medina-Tayac and D.C. inter-tribal drum group with a few words on local indigenous resistance. Also appearing will be Havana Edwards, aka “the tiny diplomat,” a black 7-year-old D.C. activist speaking about her experience with lack of water access.

Another speaker will be Iris Fen Gillingham, an 18-year-old core team member, who will talk about how her family lost their livelihood to climate change. Xiuhtezcatl will perform again, and he’ll also discuss fracking in his hometown in Colorado. A coalition of youth from Standing Rock will speak about their experiences on the front lines of protesting the Dakota Access Pipeline.