Greta Thunberg has appeared in a recent documentary fighting back tears as she recalled her public spat with Donald Trump and the lack of empathy in the world.

The pair are far from each other's biggest fans, with the former president often taking issue with the 18-year-old's passion for climate activism (and Greta trolling the Trump right back).

And in a recent PBS special, Greta Thunberg: A Year to Change the World, Thunberg opened up about the feud. The emotional moment sees the teen sob as she speaks about the loss of empathy in our world today.

Thunberg said in the special: "I held a speech and the only thing people were interested in was Greta versus Trump - 'What do they say about each other?' But I just ignored him completely."

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She then recalled how Trump mocked her and other activists at the World Economic Forum for caring too much about their climate activism.

The teenager said through tears: "If you feel bad today, so many people are so sad and so depressed but that's a good thing because that means they still have empathy and they don't want to live in this world where we have lost empathy.

"So many people come up to me and say they believe that there's something wrong with them because they are feeling like s**t.

"But I think it's the opposite. It's the rest who can remain living in this society where we only care about prestige, and these are shallow things that don't matter, and being the best and so on. Those are the people who are not normal."

[[imagecaption|| Credit: Franz Perc / Alamy Stock Photo]]

Thunberg went on to describe herself as "very emotional", "very small" and "very weak in a way" - but said that these were things that she is "proud" of.

Her feud with the former president arose when she appeared to scowl as she saw him at the UN's climate summit in 2019.

It was at this summit that she made an impassioned speech directed at world leaders about the importance of addressing climate change.

Trump went on to mock her on Twitter, telling her she needs to work on her "anger management problem, then go to a good old-fashioned movie."

Featured image credit: Jasper Chamber / Alamy Stock Photo

An emotional Greta Thunberg fights back tears recalling feud with Donald Trump