How did a 15-year-old protesting outside the Swedish parliament build a global movement in under a year? Greta Thunberg is a phenomenon who has transformed the way the world looks at environmental protests.
She has inspired the #ClimateStrike, one of the largest climate protests in history, with millions taking to the streets in 139 countries.
We track her rise to fame and explore why her climate strikes have been so successful.
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