March in Chicago
Demonstrators chant during the People's Climate March on April 29, 2017 in Chicago, Illinois. The People's Climate March began in 2014. The first event was aimed at gaining support for climate change interest, and took place about a year before the Paris climate agreement, the Washington Post reported. Today's event was focused on fighting rollbacks of regulations. One of the signs read, "There is no Planet B." It's one of the more popular messages for the movement -- and was also seen at the science marches last week. (Getty)