Greta Thunberg spent Monday trying to get world leaders to do something about climate change.

On Tuesday, she proved also knows a lot about shade ― specifically the Twitter kind.

The Swedish teen activist gave a powerful speech on Monday at the United Nations Climate Action Summit, accusing world leaders of turning a blind eye to global climate problems in exchange for profits and temporary economic growth.

Thunberg’s speech soon went viral and prompted President Donald Trump ― ever the statesman ― to mock her on Twitter:

She seems like a very happy young girl looking forward to a bright and wonderful future. So nice to see!

As of Tuesday afternoon, Thunberg hadn’t responded directly to the president’s tweet. However, visitors to her Twitter page noticed a slight change to her bio.

It now described her as “a very happy young girl looking forward to a bright and wonderful future.”