View of Climate Change March in New York from West Side near 59th and Central Park South.An international day of action on climate change brought tens of thousands onto the streets of New York City on Sunday, with organizers predicting the biggest protest on the issue in five years.Some 100,000 people, including United Nations Secretary-General Ban Ki-moon, former U.S. Vice President Al Gore, actor Leonardo DiCaprio and elected officials from the United States and abroad joined the People’s Climate March, ahead of Tuesday’s United Nations hosted summit in the city to discuss reducing carbon emissions that threaten the environment.Organizers said some 550 busloads of people had arrived for the rally, which followed similar events in 166 countries including Britain, France, Afghanistan and Bulgaria. Thousands more came by public transportation, walked or traveled in private cars.