Al Jazeera: Celebrities, activists and political leaders are expected to join more than 100,000 people in New York City on Sunday for what organizers say will be the largest climate-change march in history.
The Peoples Climate March has been endorsed by more than 1,400 organizations, including environment, faith and justice groups, as well as labor unions. Students have also mobilized marchers at more than 300 college campuses for the event, which calls on world leaders to do more to confront the threat...