U.S. air pollution is worsening after improving for years - CBS News - discu.eu

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U.S. air pollution is worsening after improving for years https://www.cbsnews.com/news/increased-economic-activity-wildfires-coincide-with-deadly-decline-in-u-s-air-quality/ 20 comments 23/10/2019 worldnews

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Recent Increases in Air Pollution: Evidence and Implications for Mortality | NBER https://www.nber.org/papers/w26381 55 comments

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