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July 27, 2026Short & citedBlog
Civic Viewpoint.
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Civic Brief • Activism

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.

Updated July 27, 20261 min readCited sources

Greta Thunberg is a Swedish climate activist who sparked a global youth movement with her 2018 school strike. She remains one of the most recognized campaigners on climate change and related political issues.

What it is

Greta Thunberg (born 3 January 2003 in Stockholm, Sweden) is an environmental and political activist. She became globally known in 2018 when, at age 15, she began a solo school strike outside the Swedish parliament to demand stronger climate action. That protest grew into the international Fridays for Future movement.

Why it matters

Thunberg’s activism helped shift public discourse on climate change, especially among young people. She has addressed major international forums and inspired school strikes worldwide, including in Canada. Her public identification with Asperger syndrome has also contributed to broader conversations about neurodiversity.

Key details

Thunberg left school in 2023. In 2025, reports described her involvement in Gaza-bound flotilla activism, leading to detention and deportation by Israeli authorities. Her net worth is not reliably confirmed by available sources.

In short

  • Started a solo climate strike in 2018 that became the global Fridays for Future movement.
  • Has spoken publicly about being on the autism spectrum.
  • Expanded activism to other political causes, including Gaza flotilla efforts in 2025.
  • Influenced youth climate protests in Canada and elsewhere.
Canadian angle

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

Quick 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 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.

Sources

  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.