Updated: Jan. 3, 2023 at 1:05 PM
Greta Thunberg turns 20: a look back(13 images)
Swedish environmental activist Greta Thunberg, known for challenging world leaders and influencers, turns 20 on January 3, 2023. Thunberg will release "The Climate Book" in February. Here's a look back at her career through the years.
Greta Thunberg participates in the School Strike for Climate reform at the Ellipse near the White House in Washington on September 13, 2019. Thunberg, in 2019, was named Time's Person of the Year. Photo by Tasos Katopodis/UPI
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Thunberg speaks onstage at Battery Park at the Global Climate Strike March in New York City on September 20, 2019. Photo by John Angelillo/UPI
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