The Biggest Ever Climate Change Protest Across The World Millions of people around the world organized a global climate strike on Friday, inspired by activist Greta Thunberg. Protesters on the continents waved posters and shouted slogans about what could be the biggest demonstration of global warming caused by people. “Our house is on fire”, Mrs. Thunberg said at a rally and aded that we are not just going to stand aside and watch. The day began in the Pacific and Asia and ended in a big show in New York. It precedes a UN summit at its headquarters in Manhattan next week. The activists want more efforts to combat climate change.