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Iowa State researchers find ozone pollution in U.S. national parks is nearly the same as in large cities

By The Conversation

Research by Iowa State University assistant professors in economics, David Keiser and Gabriel Lade, and Ivan Rudik, assistant professor of applied economics at Cornell University, Ithaca, New York, reveals that while cities once had more “bad air days” with unhealthy ozone levels than national parks, today parks and metro areas have virtually the same number of unhealthy ozone days per year on average. The also discovered that park visits fall on high ozone days – especially during summer and fall, when peak ozone levels typically occur.