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Case file

Greta Thunberg

Wikipedia's first sentence called it “swedish environmental activist who has gained international recognition for promoting the view that humanity is”. Today it says “swedish activist known for pressuring governments to address climate change and social issues”. The one-line description Wikipedia serves to search engines and AI systems read “Swedish climate activist”. It now reads “Swedish activist (born 2003)”.
Measured, not asserted. Every count, date and revision on this page was taken from Wikipedia's own history and checked against the live article. The words quoted are theirs.
Machine-checked against the full current article on 2026-08-03.
We saved snapshots of this article over twenty years; you are reading the 2025 one. Red dashes: removed from Wikipedia since. Pale dots: rewritten; the numbered note shows what it says now. 1 tap a number or a side note to jump between them
The opening as it read in 2025

Greta Tintin Eleonora Ernman Thunberg ( Swedish pronunciation: [ˈɡrêːta ˈtʉ̂ːnbærj] ; born 3 January 2003) is a Swedish climate and political activist initially known for challenging world leaders to take immediate action to mitigate the effects of climate change . Born in Stockholm , Thunberg's climate activism began when she persuaded her parents to adopt lifestyle choices that reduced her family's carbon footprint . In August 2018, aged 15, Thunberg began skipping school, vowing to remain out of school until after a Swedish election to attempt to influence the outcome. She protested outside the Swedish parliament where she called for stronger action on climate change by holding up a Skolstrejk för klimatet ( School Strike for Climate ) sign and handing out informational flyers. After the election, Thunberg spoke in front of supporters, telling them to use phones to film her. She then said she would continue school striking for the climate every Friday until Sweden was in compliance with the Paris climate agreement . Thunberg's youth and blunt speaking manner fueled her rise to the status of a global icon. After Thunberg's first school strike for the climate, other students engaged in similar protests. They united and organized the school strike for climate movement. After Thunberg addressed the 2018 United Nations Climate Change Conference , weekly climate strike protests took place on Fridays around the world. In 2019, coordinated multi-city protests involved over a million students each. To avoid carbon-intensive flying, Thunberg sailed on a carbon-free yacht from England to New York where she addressed the 2019 UN Climate Action Summit . In her speech, Thunberg scolded the world's leaders by exclaiming " How dare you " in reference to their perceived indifference and inaction to the climate crisis. After Thunberg graduated from high school in 2023, her activism continued to gain international attention and her protest tactics have become increasingly assertive. As an adult, her protests have included both peaceful demonstrations and acts of civil disobedience such as defying lawful orders to disperse, which have led to arrests, convictions, and an acquittal. Thunberg's activism has evolved to include other causes, supporting Ukraine, Palestine, Armenia and Western Sahara in their respective conflicts with Russia , Israel , Azerbaijan and Morocco . Thunberg's rise to world fame made her an ad hoc leader in the climate activist community. She faced heavy criticism, especially due to her age. Thunberg's influence on the world stage has been described by The Guardian and other media as the "Greta effect". She has received honours and awards , including in Time 's 100 most influential people , named the youngest Time Person of the Year in 2019, inclusion in the Forbes list of The World's 100 Most Powerful Women (2019), and nominations for the Nobel Peace Prize . "Before Greta Thunberg was a global icon, she was a tormented child who refused to eat or speak" . "Greta Thunberg to world leaders: 'How dare you – you have stolen my dreams and my childhood' – video" .

This is Wikipedia's own text, saved in our repository. Their copy of it is revision 1297997372.
Today
Wikipedia's first sentence called it “swedish environmental activist who has gained international recognition for promoting the view that humanity is”. Today it says “swedish activist known for pressuring governments to address climate change and social issues”. The one-line description Wikipedia serves to search engines and AI systems read “Swedish climate activist”. It now reads “Swedish activist (born 2003)”. Read the current article and compare.
2020Oct '232025
Counts in the opening at each snapshot. Green: the word gained ground. Red: it was cut. Grey: no change.

What Wikipedia says this is

Every article opens by defining its subject. This one was redefined since 2020, and today's defining sentence is their current revision.

Then

swedish environmental activist who has gained international recognition for promoting the view that humanity is

Now

swedish activist known for pressuring governments to address climate change and social issues

Struck red text is no longer in the article; dotted amber text was rewritten. Every revision id links to Wikipedia's copy; the text shown is our own saved copy. Data: /data. Wikipedia text is CC BY-SA; quoted for the record; not affiliated with Wikipedia.

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