Iowa's air pollution plan for national parks gets federal approval

The US environmental regulators have approved Iowa's plan to reduce haze and improve visibility in national parks. This means Iowa's strategy for cleaning up its air meets federal requirements for the next decade.

States must regularly update their plans to clean up regional haze, which affects visibility in national parks and wilderness areas. This approval means Iowa's current approach to industrial emissions and other pollution sources is locked in for the next ten years. It sets a precedent for how other states might approach their own haze reduction plans.