Five environmental organizations have filed suit against the Environmental Protection Agency for failing to toughen the allowable limit of ozone in the atmosphere. Last month, President Obama ordered the agency not to lower the ozone limit to 70 parts per billion from the current limit of 75. The lower amount, Obama said, would unduly burden the U.S. economy as it struggles to emerge from a three-year recession. The plaintiffs include the American Lung Association and the Appalachian Mountain Club. According to the EPA's own estimates, medical problems associated with the higher limit could pose similar or greater costs on the economy.
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