Teen climate activist Greta Thunberg leads march in South Dakota

Teen climate change activist Greta Thunberg joined global protests on Monday from South Dakota where she led a march in downtown Rapid City. Sixteen-year-old Thunberg made a surprise announcement that she would participate in the event on Sunday as she visited the Pine Ridge Reservation to meet with Native American activists.

Thunberg spoke to her fellow activists, vowing that they would not back down and never give up. Thunberg's visit came as thousands of climate-change protesters took to the streets in cities around the world on Monday. The protests are the latest stage in an global campaign for tougher and swifter steps against climate change coordinated by Extinction Rebellion.