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Greta Thunberg

Greta Thunberg is a Swedish environmental and political activist best known for her school strike for climate, which began in 2018 and helped spark the global Fridays for Future movement.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

Greta Thunberg is a Swedish environmental and political activist best known for her school strike for climate, which began in 2018 and helped spark the global Fridays for Future movement. She has become an internationally recognized campaigner on climate change and is one of the most prominent youth activists of the 21st century.

Early life

Greta Thunberg was born in Stockholm, Sweden, in 2003. Public biographies describe her as a Swedish activist who became concerned about climate change at a young age.

Climate activism

In 2018, at age 15, she began a solo school strike outside the Swedish parliament, calling for stronger action on climate change. That protest spread internationally and became associated with Fridays for Future.

Public profile and influence

Thunberg became one of the world’s best-known climate campaigners and has spoken to major international audiences. Sources describe her as influential in raising public awareness, especially among young people.

Other activism and recent events

Later reporting shows Thunberg expanding her activism beyond climate, including support for various political causes and participation in Gaza-related aid flotillas. In 2025, sources reported her detention and deportation after such activities.

Key facts

  • Thunberg became globally known in 2018 after starting a solo climate strike outside the Swedish parliament.
  • Her protest helped inspire the international Fridays for Future movement.
  • She is widely identified as a climate activist and campaigner on related social and political issues.
  • She has spoken publicly about being on the autism spectrum and has described Asperger's syndrome as part of her identity.
  • Reports in 2025 described her involvement in Gaza-bound flotilla activism and subsequent detention and deportation by Israeli authorities.
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Canadian context

Canadian readers may know Thunberg through her influence on global youth climate activism, including school strike movements and climate protests that also reached Canada.

Frequently asked questions

Who is Greta Thunberg?
Greta Thunberg is a Swedish climate activist known for starting a school strike for climate in 2018 and inspiring the Fridays for Future movement.
How old is Greta Thunberg?
Born on 3 January 2003, she is 23 years old as of 23 July 2026.
What did Greta Thunberg do?
She began a solo protest outside the Swedish parliament in 2018 to demand stronger climate action, and her campaign grew into a global youth movement.
Is Greta Thunberg autistic?
Public sources report that she has said she has Asperger syndrome, which is on the autism spectrum.
What is Greta Thunberg's net worth?
Her net worth is not reliably confirmed by the provided sources, and no authoritative figure is given here.
What happened to Greta Thunberg?
Recent reports say she was involved in Gaza flotilla activism in 2025 and was detained and deported by Israeli authorities before returning to Sweden.

References

  1. Wikipediahttps://en.wikipedia.org/wiki/Greta_Thunberg
    Supports: Birth date, Swedish identity, climate activism, Fridays for Future, and 2025 detention/deportation reporting.
  2. BBChttps://www.bbc.com/news/world-europe-49918719
    Supports: Overview of Thunberg as a leading climate activist, born in Stockholm in 2003, and notes on her influence and schooling.
  3. Britannicahttps://www.britannica.com/biography/Greta-Thunberg
    Supports: Biographical summary, founding role in Fridays for Future, and 2025 aid-ship detention/deportation.
  4. Biography.comhttps://www.biography.com/activists/greta-thunberg
    Supports: Basic biography, climate activism, and detention related to Gaza aid-boat activism.
  5. CNNhttps://www.cnn.com/climate/greta-thunberg-fast-facts
    Supports: Birth date, autism/Asperger's discussion, and 2025 flotilla-related detention/deportation.
  6. Nat Geo Kidshttps://www.natgeokids.com/uk/kids-club/cool-kids/general-kids-club/greta-thunberg-facts/
    Supports: School strike for climate and early activism facts.
  7. Right Livelihoodhttps://www.rightlivelihood.org/the-change-makers/find-a-laureate/greta-thunberg/
    Supports: Recognition as a leading climate activist and generational impact.