Greta Thunberg takes swipe at world leaders in Iowa2019|01:11
NATS "GRETA! GRETA! GRETA!" The 16-year-old Swedish climate activist who inspired youth climate action around the world took her fight to the U.S. Midwest. On Friday, Greta Thunberg drew hundreds of thousands to Iowa City to call on politicians to take action to fight climate change, offering a veiled rebuke to world leaders after her speeches at the U.N. and before U.S. Congress.