New York youth march in the streets to protest climate change A huge crowd of young people protest and march in the streets of New York during the global climate strike, led by 16-year-old Swedish activist Greta Thunberg, who insisted in a speech at Battery Park that it is "only the beginning" in the fight against environmental disaster. Some four million people filled city streets around the world, organizers said, in what was expected to be the biggest ever protest against the threat posed to the planet by rising temperatures. IMAGES