Wildfires bring lingering worries about what's in the air
Clip: 09/11/2018 | 9m 12s
For weeks, smoky, unhealthy air from large wildfires has plagued much of the West Coast and beyond. What's the public health impact of an increase of urban wildfires, in which homes and other structures burn? Special correspondent Cat Wise meets some of the researchers studying the risks for people from smoke and ash.
Aired: 09/11/18Video has closed captioning.