Hundreds of thousands of people from Australia to Paraguay joined the biggest day of climate change activism in history on Sunday, telling world leaders gathering for a summit in Paris there is 'No Planet B' in the fight against global warming.
Open this photo in gallery: Protesters carry a globe-shaped balloon in front of Rome's Colosseum in Rome, Italy. Alessandro Bianchi/Reuters
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Open this photo in gallery: Protesters participate in the Global Climate March in downtown Vancouver. Ben Nelms/The Globe and Mail
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Open this photo in gallery: Activists of the World Wildlife Fund (WWF) wearing endangered species costumes perform at the Revolution monument in Mexico City. Yuri Cortez/AFP / Getty Images
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Open this photo in gallery: People perform at Ipanema beach in Rio de Janeiro, Brazil. Christophe SIimon/AFP / Getty Images
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Open this photo in gallery: Protesters take part in a rally held the day before the start of the 2015 Paris Climate Change Conference, on Parliament Hill in Ottawa. Chris Wattie/Reuters
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Open this photo in gallery: A woman takes part in the Global Climate March in Sao Paulo, Brazil. Nelsom Almeida/AFP / Getty Images
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Open this photo in gallery: A person dressed up as a panda bear takes part in the "Global Climate March" on November 29, 2015 in Madrid, Spain. Gerard Julien/AFP / Getty Images
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Open this photo in gallery: A participant with painted face attends the Global Climate March in Jakarta, Indonesia,. Dita Alangkara/The Associated Press
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Open this photo in gallery: A woman stays in front of a model of the earth holding a thermometer as activists participate in the Global Climate March in Berlin, Germany. Carsten Koall/Getty Images
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Open this photo in gallery: A Filipino environmental activist looks out from a "sun" cardboard cutout during a global protest action ahead of the 2015 Paris Climate Conference. Erik De Castro/Reuters
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