Teenage climate change activist Greta Thunberg responded to a tweet in which President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE appeared to mock her, saying, "It doesn’t make any difference."

Thunberg told the Scandinavian talk show "Skavlan" that the president's tweet could be interpreted in "many different ways."

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"I knew that sometime he is probably going to say something about me," the Swedish teen said. "And it was like it doesn't make any difference in a way."

After Thunberg made an emotional speech to the United Nations regarding climate change, Trump tweeted that she "seems like a very happy young girl."

She seems like a very happy young girl looking forward to a bright and wonderful future. So nice to see! https://t.co/1tQG6QcVKO — Donald J. Trump (@realDonaldTrump) September 23, 2019

The host also asked Thunberg if she sensed any sarcasm in Trump's tweet.

"Well of course I do, but yeah of course he's going to write that," she said.

The activist was also shown the picture of her staring at the president as he arrived for a United Nations climate summit. She said in the interview that she was in shock when security told her to step aside, and Trump appeared.

Thunberg, who has taken a leadership role in the push for preventing climate change, has been thrust into the spotlight recently. She condemned world leaders for not making changes during remarks at the United Nations on Monday.

"People are suffering, people are dying, entire ecosystems are collapsing. We are in the beginning of the mass extinction and all you can talk about is money and fairy tales of eternal economic growth. How dare you,” she said during her speech.