This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.From London to Los Angeles and from Perth to Paris, climate activists are taking part in a global general strike on Friday in what is expected to be the biggest day of climate demonstrations in the planet’s history. Some of the first protests were held in Australia and organizers have said “well over” 300,000 people gathered at more than 100 cities and towns across that country. Melbourne hosted the biggest march, according to organizers, with 100,000 people turning out, while 80,000 rallied in Sydney and 30,000 in Brisbane. The crowd in New York was massive, stretching from Foley Square down Centre Street to Broadway, according to Manhattan Borough President Gale Brewer, who posted video to Twitter. The Global Climate Strike is the third in a worldwide series of climate rallies organized by school students, and led by 16-year-old Greta Thunberg. Protestors hope to put pressure on politicians and policy makers to act on climate issues. Thunberg tweeted: “Incredible pictures as Australia’s gathering for the #climatestrike … Australia is setting the standard!” FOLLOW LIVE UPDATES Thunberg, a Swedish student who is in New York ahead of the United Nations Climate Action Summit on Monday, around 4,638 events have been organized in 139 countries. Protests have been held on some of the Pacific Island nations most under threat from the climate crisis — the nation of Kiribati may be the first country to disappear under the rising sea levels of climate change — while people turned out to march in New Zealand, Thailand and India. “Where is my right to breathe?” read one defiant sign held up by a protestor in New Delhi, India, in a picture posted by Greenpeace India on Twitter. Meanwhile, in Thailand young protestors pretended to collapse as they demanded transformative action on the climate crisis.