The American Lung Association, Environmental Defense Fund, Natural Resources Defense Council, and Appalachian Mountain Club filed a lawsuit in the U.S. Court of Appeals for the District of Columbia Circuit October 11 challenging the Environmental Protection Agency’s decision to not adopt more stringent ozone air quality standards. The agency was scheduled to release a final rule setting the primary standard at 0.070 ppm, but President Obama determined September 2 that he did not want to increase regulatory burdens and uncertainty through the rule.