Skip to main content
Back to Show
PBS News Hour

How moss revealed an undetected threat in Portland

Portland, Oregon, prides itself on being very focused on the environment. So many people were shocked to discover that certain neighborhoods contain high levels of toxic metals. Scientists made the discovery when ordinary moss samples taken from all over town revealed the unexpected contamination. Special correspondent Cat Wise reports on how it led to some significant changes in the city.

Sign up now for inspiring and thought-provoking media delivered straight to your inbox.
Support Provided By
Season
July 1, 2025 - PBS News Hour full episode
57:46
July 1, 2025 - PBS News Hour full episode
June 30, 2025 - PBS News Hour full episode
57:46
June 30, 2025 - PBS News Hour full episode
June 29, 2025 - PBS News Weekend full episode
26:45
June 29, 2025 - PBS News Weekend full episode
June 28, 2025 - PBS News Weekend full episode
26:45
June 28, 2025 - PBS News Weekend full episode
June 27, 2025 - PBS News Hour full episode
57:46
June 27, 2025 - PBS News Hour full episode
June 26, 2025 - PBS News Hour full episode
57:46
June 26, 2025 - PBS News Hour full episode
June 25, 2025 - PBS News Hour full episode
57:46
June 25, 2025 - PBS News Hour full episode
June 24, 2025 - PBS News Hour full episode
57:46
June 24, 2025 - PBS News Hour full episode
June 23, 2025 - PBS News Hour full episode
56:45
June 23, 2025 - PBS News Hour full episode
June 22, 2025 - PBS News Weekend full episode
26:45
June 22, 2025 - PBS News Weekend full episode
June 21, 2025 - PBS News Weekend full episode
26:45
June 21, 2025 - PBS News Weekend full episode
June 20, 2025 - PBS News Hour full episode
56:44
June 20, 2025 - PBS News Hour full episode
Active loading indicator