Teen “climate change” activist Greta Thunberg needs to “chill,” according to President Trump.

The president had advice today for the alarmist who likes to berate adults for not doing what she demands.

“Greta must work on her Anger Management problem, then go to a good old fashioned movie with a friend! Chill Greta, Chill!”

In September, the 16-year-old Swedish “climate change” activist appeared at the United Nations alongside older speakers, but she repeatedly berated her audience, sneering at them over what she believes is inaction to save the planet.

I shouldn’t be up here. I should be back at school on the other side of the ocean,” she said, tearing up.

“You come to us young people for hope. How dare you?” she lectured.

“You have stolen my dreams and my childhood with your empty words, yet I’m one of the lucky ones. People are suffering, people are dying, entire ecosystems are collapsing.

“We are in the beginning of a mass extinction, and all you can talk about is the money and fairy tales of eternal economic growth. How dare you!” Thunberg continued.

“But no matter how sad and angry I am, I do not want to believe that, because if you really understood the situation and still kept on failing to act, then you would be evil, and that I refuse to believe,” she said moments later.

“There will not be any solutions or plans presented in line with these figures here today because these numbers are too uncomfortable, and you are still not mature enough to tell it like it is,” Thunburg told them.

“You are failing us,” she said. “But the young people are starting to understand your betrayal.

“The eyes of all future generations, are upon you, And if you choose to fail us. I say, we will never forgive you!”

The adults applauded her browbeating of them.

The same day, she had a chance encounter with Trump, and she gave him a healthy scowl.

Watch:

Thunberg, a 16-year-old Swede, was preparing to lecture the adults about the supposed “global warming” taking place, and was in a holding area when Trump walked past her.

After he didn’t acknowledge her presence, she scowled at him.