16-Year-Old Greta Thunberg Staring Down Donald Trump at UNGA Ignites Twitter: 'We Are All Greta'

A GIF of 16-year-old climate activist Greta Thunberg staring at President Donald Trump with a sour look on her face her united many Twitter users on Monday, rallying people behind the message, "We are all Greta."

The GIF zoomed in on Thunberg's angry face and zoomed out as Trump walked past her in the lobby of the United Nations, where she had given a powerful speech calling on global leaders to step up their fight against climate change. The GIF was shared by Twitter users including Republican strategist and political commentator Ana Navarro-Cárdenas, who wrote, "We are all Greta."

Trump has been criticized for rolling back policies that were designed to protect the environment and combat greenhouse gas emissions. The look on Thunberg's face suggested she was not happy with the president.

Thunberg delivered a speech before the United Nations General Assembly at the Climate Action Summit on Monday, accusing global leaders of failing people of younger generations by not aggressively fighting climate change.

"This is all wrong," Thunberg, of Sweden, said. "I shouldn't be up here. I should be back in school on the other side of the ocean. Yet you all come to us young people for hope? How dare you!"

Thunberg said the United Nations' proposal to cut emissions in half over the next decade "only gives us a 50% chance of staying below 1.5C degrees, and the risk of setting off irreversible chain reactions beyond human control."

"You are failing us. But the young people are starting to understand your betrayal. The eyes of all future generations are upon you," Thunberg concluded. "And if you choose to fail us I say we will never forgive you. We will not let you get away with this. Right here, right now is where we draw the line."

The United States was among countries not invited to the climate action summit organized by United Nations Secretary-General António Guterres because the disapproves of their greenhouse gas emissions output.

But Trump, though he was not invited to the summit, crashed it for 10 to 15 minutes along with Vice President Mike Pence. Trump sat with pursed lips and listened to speeches by German Chancellor Angela Merkel and Indian Prime Minister Narendra Modi, according to Business Insider.

When asked why he dropped into the summit, Trump said, "I'm a big believer in clean air and clean water, and all countries should get together and do that, and they should do it for themselves. Very, very important," according to CNN.