On September 2, 2011 the President requested that the United States Environmental Protection Agency (EPA) withdraw the draft final rule "Reconsideration of the 2008 Ozone Primary and Secondary National Ambient Air Quality Standards." Given the President's request, Cass Sunstein, Administrator of the Office of Management and Budget, returned the draft final rule to EPA for "reconsideration" in light of three emphasized points:
- Finalizing a new standard may produce "needless uncertainty."
- The draft reconsideration would not rely on the "best available science" because the Clean Air Science Advisory Committee's scientific assessment for the 2013 mandatory review of the ozone National Ambient Air Quality Standards (NAAQS) is already underway.
- EPA has already made significant progress in decreasing ozone and other pollution levels.