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A man crosses a street in downtown Portland, Oregon where air quality due to smoke from wildfires was measured to be amongst the worst in the world, September 14, 2020. The deadly fires spreading across three western US states are causing record-breaking pollution and a spate of health woes, from headaches and coughs to impaired vision, that have residents worried about the long-term consequences Portland, the largest city in Oregon, has been blanketed for days by a dense smog that has sent pollution meters soaring. (Photo by Robyn Beck/AFP Photo)
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