Oregon’s Air Laws Are failing us

It started with a patch of moss... In 2013, U.S. Forest Service scientists began collecting samples of moss from trees in Portland, Oregon as part of a ground breaking air quality study. Based on past research indicating that concentrations of elements found in moss are reflective of atmospheric concentrations, the Forest Service was able to use those samples to not only identify air toxics, but estimate their locations and, in some cases, their sources. Continue reading at The Portland Air Problem.

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