California September 23, 2019 12:28 pm ‘Change Is Coming Whether You Like it or Not': Greta Thunberg Climate change activist Greta Thunberg, 16, spoke at the United Nations Climate Change Action Summit on Monday. US & World Videos 1:40 Democrats say Big Oil misled public for decades about climate change 4:14 What to expect: Previewing the 2024 Met Gala 3:37 Learning about the Art Resource Collaborative for Kids 3:25 Mother's Day gift ideas with William James Gifts 1:35 Understanding the Biden administration's plans to reclassify marijuana