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Midwest pollution spiked dramatically this summer because of Canadian wildfires. Now officials may erase those days from the books.
Dozens of states and the EPA are so concerned they may exclude the smokiest days from the legally binding score cards that determine whether they’re doing enough to fight pollution, according to a joint collaboration between the Tribune and the nonprofit news site MuckRock. Now some states are considering banding together in a joint effort that could trigger the largest exclusion in the history of the federal Clean Air Act