The climate change rally led by activist Greta Thunberg saw millions of protesters worldwide standing up for urgent action.
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Climate activist Greta Thunberg was named Time magazine's Person of the Year.
Climate change activist Greta Thunberg gave a speech in London, leading to protests across the city for four days.
During the Senate climate crisis task force, climate change activity Greta Thunberg said, 'You're not trying hard enough. Sorry.'
1.4 million students across 125 nations participated in the School Strike for Climate.