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EPA’s NOx Standard Upheld by Federal Court

The U.S. Court of Appeals in Washington, D.C. has upheld a federal rule that limits the oxides of nitrogen content of ambient air to 100 parts per billion.
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The U.S. Court of Appeals in Washington, D.C. has upheld a federal rule that limits the oxides of nitrogen content of ambient air to 100 parts per billion.

The standard drafted by the Environmental Protection Agency in 2010 would establish a monitoring requirement for areas surrounding urban highways.

The American Petroleum Institute and other trade groups for energy producers challenged the rule as arbitrary and capricious. The API argued that the EPA cherry-picked studies that supported its conclusions and discounted others that did not.

In rejecting that claim, the court's three-judge panel said the EPA had adequately documented the respiratory damage and other harm to public health caused by high NOx levels.

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