Amna Nawaz
@PBSNewsHour·5.3M subscribers·62.2K videos
How moss revealed an undetected air pollution threat in Portland
Posted
October 12, 2016
Views
7,959
Likes
97
Engagement
1.22%
October 12, 2016
7,959
97
1.22%
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8:20Now PlayingPortland, 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.
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