Greta Thunberg gave the COP26 climate summit a failing grade.

Thunberg, an 18-year-old Swedish environmental activist, was in Glasgow for the United Nations Climate Change Conference, which runs from Sunday to Nov. 12. She helped lead a protest among youth in the city, including a school strike, to protest what she called weak initiatives on climate change.

"It is not a secret that COP26 is a failure," she said. "It should be obvious that we cannot solve a crisis with the same methods that got us into it in the first place."

GRETA THUNBERG TO WORLD LEADERS: 'SHOVE YOUR CLIMATE CRISIS UP YOUR A***'

Fridays for Future Scotland, which was "founded by young people from across Scotland in early 2019" and "inspired by the work of Greta Thunberg," organized the demonstration, according to the BBC.

Thunberg is known for her own School Strike for Climate in 2018 when she was in ninth grade.

"We need immediate drastic annual emission cuts unlike anything the world has ever seen," Thunberg said. "The people in power can continue to live in their bubble filled with their fantasies, like eternal growth on a finite planet and technological solutions that will suddenly appear seemingly out of nowhere and will erase all of these crises just like that."

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She told those she deemed too soft on climate change to "shove" the climate crisis up their "a***" on Tuesday.

"No more exploitation, no more blah, blah, blah," she said. "No more whatever the f*** they’re doing inside there."

She later said, "You can shove your climate crisis up your a***."