As @EPA's smog rule takes effect, new research shows the benefits of regulating ozone are greater than thought. https://epic.uchicago.edu/news-events/news/epa-smog-rule-takes-effect-new-research-shows-benefits-regulating-ozone-are-greater …pic.twitter.com/n3xT2G7XTw
10:21 AM - 28 Sep 2017
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