See Thousands March for Climate Change

Hundreds of thousands of protesters take part in the People's Climate March in Manhattan, in New York City, on Sept. 21, 2014

John Minchillo—AP Images

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Demonstrators at the front of the march in Manhattan.

Eduardo Munoz—Reuters

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Marchers roll a model of planet Earth.

Timothy Fadek—Bloomberg/Getty Images

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A protester with "One Planet" drawn on her face takes part in the "People's Climate March" down 6th Ave.

Carlo Allegri—Reuters

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Marchers carry a banner in midtown Manhattan.

John Minchillo—AP Images

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Marchers sing out as they walk along Sixth Ave. during the People's Climate March in New York, Sept. 21, 2014.

Craig Ruttle—AP

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A girl dances under a protest parachute.

Carlo Allegri—Reuters

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September 21, 2014 9:25 PM EDT