Greta Thunberg jabs Trump as he leaves office
© Getty

Swedish climate change activist Greta ThunbergGreta ThunbergLet's plan for human ingenuity in our fight against climate change Energy & Environment — Beyond COP26 Greta Thunberg dismisses COP26 pact: 'The real work continues outside these halls' MORE needled President TrumpDonald TrumpMedia giants side with Bannon on request to release Jan. 6 documents Cheney warns of consequences for Trump in dealings with Jan. 6 committee Jan. 6 panel recommends contempt charges for Trump DOJ official MORE on Wednesday as Trump departed the White House for the final time.

Calling back to an old jab Trump himself had once levied at her, Thunberg quipped that the president looked like "a very happy old man looking forward to a bright and wonderful future" as he climbed the steps of Marine One.

Thunberg's tweet referenced a remark made by the president in 2019. When referring to Thunberg's address to the United Nations, Trump tweeted that she looked like "a very happy young girl looking forward to a bright and wonderful future," apparently mocking the dire warnings the activist had delivered. 

The two briefly crossed paths at a U.N. event on climate change that year, where Thunberg was seen glaring at the president from afar as the latter addressed reporters.

Thunberg, 18, is a vocal critic of industrialized nations' commitment to fighting climate change and first attained notoriety after organizing strikes among schoolchildren in Sweden and around the world in support of action against climate change.