Critics question EPA's tighter ozone limits


By Deborah Zabarenko, Environment Correspondent WASHINGTON, June 21 (Reuters) - The U.S. Environmental Protection Agency offered tighter standards for ozone pollution for the first time since 1997 but critics said on Thursday the proposal is more lax than what the EPA's own experts recommended. The environment agency proposed the new rules for ground-level ozone -- damaging pollution also known as smog that is spawned by motor vehicle exhaust, power plants, gasoline vapors and chemical ...

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