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Portland's Toxic Air Problem

Portland's air is dirtier than we thought. A study conducted by researchers at the U.S. Forest Service revealed dangerously high levels of heavy metals in Portland, sparking an investigation into the sources and causing regulators and officials to question why the pollution was left unchecked for so long.


About Portland's Toxic Air Problem

A study of tree moss in Portland revealed high levels of arsenic, cadmium, nickel and lead in the air surrounding a pair of Portland glass companies. The revelation showed holes in the Oregon Department of Environmental Quality's testing procedures and regulations. Now a push is on by state and local officials to fix the pollution problem and tighten regulations.