Environmental activists called for people to gather on the streets of their cities on Sunday to march in a coordinated worldwide protest, in hopes that it would mark a turning point for global warming.
Ahead of the United Nations Climate Summit in New York City, more than 300,000 people, including celebrities and politicians, descended on Manhattan for the so-called People's Climate March.
The organizers of the protest tweeted this video shot with a drone that probably gives the best view of the crowd gathered near Central Park, where the march started.
The pictures below give an idea of just how many people turned out in support of the global protest, which may well make history as the largest environmental demonstration ever.
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