Science & EnvironmentPortland researchers track microplastic pollution in Columbia River BasinBy Cassandra Profita (OPB)June 21, 2022 11:46 p.m. Updated: June 22, 2022 3:01 p.m.Study will sample air and water in urban and rural areas to identify pollution sources so they can be better managedTHANKS TO OUR SPONSOR:Become a Sponsor📨 Daily news in your inboxSign up today for OPB’s “First Look” – your daily guide to the most important news and culture stories from around the Northwest.EmailPlease leave this field blankSign up