A progressive climate activist recently handcuffed himself to a J.P. Morgan Chase building in Los Angeles, California, to protest government and corporate inaction on climate change.

What are the details?

Peter Kalmus, a data scientist at NASA's Jet Propulsion Laboratory in California, also wept as he spoke amid the demonstration, lamenting that the earth his heading toward a "f***king catastrophe" but that no one is listening to him and others in the scientific community.

"I'm willing to take a risk for this gorgeous planet, for my sons," Kalmus said, trying to hold back tears, according to video posted on social media by the Climate Ad Project.

"We're going to lose everything," he gloomily predicted.

Here's a video of the action we took in Los Angelespic.twitter.com/TlYrwwGB8v

— Peter Kalmus (@Peter Kalmus) 1649878104

"We've been trying to warn you guys for so many decades that we're heading towards a f***ing catastrophe, and we've been being ignored," he continued after gathering his emotions. "The scientists of the world are being ignored, and it's got to stop. We're not joking. We're not lying. We're not exaggerating."

Kalmus — who lists his location on Twitter as "Colonized Hahamog'na land, CA" — was joined in protest by physicist Greg Spooner, science educator Allan Chornack, and engineer Eric Gill, according to Business Insider.

Others involved in the protest complained about their failures to motivate collective action despite trying to be "unbiased," "silent," and utilizing "celebrities."

"We've tried everything!" Chornack angrily shouted through a megaphone.

What's the background?

The demonstration appeared to be coordinated by a group called Scientist Rebellion, a branch of Extinction Rebellion that empowers concerned scientists and activists to commit acts of civil disobedience to advocate for climate action.

According to the Smithsonian magazine, the group was responsible for coordinating protests involving more than 1,000 scientists from 25 countries earlier this month.

The protests followed the release of the Intergovernmental Panel on Climate Change's (IPCC) latest report, which warned that radical cuts to greenhouse gas emissions are needed by 2025 to ward off catastrophic climate effects.

Kalmus and others reportedly targeted J.P. Morgan Chase because of the massive banking company's alleged excessive funding of fossil fuels.

He and his companions were eventually arrested by police for blocking the entrance to the bank's building but were released from custody shortly after. Ever since, Kalmus has been rattling off tweets complaining about the lack of media coverage the protests are getting.

"This is the biggest story in all of human history, yet it makes less of a dent in the news cycle than Will Smith," he wrote in one tweet.

This is the biggest story in all of human history, yet it makes less of a dent in the news cycle than Will Smithpic.twitter.com/vlp1b9Q0KK

— Peter Kalmus (@Peter Kalmus) 1649136194

"Shouldn't over 1,000 scientists risking arrest to save the planet be a bigger news story than Elon Musk trying to buy Twitter?" he said later.

Shouldn't over 1,000 scientists risking arrest to save the planet be a bigger news story than Elon Musk trying to buy Twitter?

— Peter Kalmus (@Peter Kalmus) 1649979100