In 2020, researchers discovered that more than 1,000 tons of plastic—that’s over 100 million plastic water bottles worth—rains down on National Parks and wilderness in the western U.S. every year. How is that possible?

This week's episode features microplastics researcher Imari Walker. Check out her YouTube channel here: https://www.youtube.com/channel/UCoiqwAaGW6-xANs3XOCO_Pg