Agence France-Presse: Tens of thousands of people marched in New York and across the globe on Sunday, joined by celebrities and political leaders to demand urgent action to stem climate change.
Hollywood actor Leonardo DiCaprio, US former vice president turned advocate Al Gore, UN chief Ban Ki-moon and New York mayor Bill de Blasio marched down Sixth Avenue in what organizers hoped would be the largest such protest in history.
In London, an estimated 40,000 people paraded past Trafalgar Square and the Houses of...