Greta Thunberg spoke at the climate strike in New York City Friday, arriving on stage at a rally in Battery Park to cheers of “Greta! Greta!”

Thunberg began by listing off numbers of participants in the climate strike around the world, stating that at least 250,000 people in New York City joined roughly four million others striking worldwide. CNN has not verified these numbers.

“It’s just not the young people’s house. We all live here. It affects all of us,” Thunberg said. “Why should we study for a future that is being taken away from us? That is being stolen for profit? Some people say we should study to become climate scientists or politicians, so that we can, in the future, solve the climate crisis. But by then, it will be too late. We need to do this now.”

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