EPA denied a petition for reconsideration of its amendments to the Renewable Fuel Standard Program.

EPA issued a final rule requiring monitoring and reporting of greenhouse gas (GHG) emissions from additional sources of fluorinated GHGs.

EPA extended and clarified its stay of the final rule entitled "Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NSR): Reconsideration of Inclusion of Fugitive Emissions."

The Agricultural Marketing Service proposed revisions to the Federal Seed Act to update regulations and to prevent potential conflicts with states.

EPA determined that hydrofluoroolefin-1234yf is an acceptable substitute for chlorofluorocarbon-12, an ozone-depleting substance, in motor vehicle air conditioning for new passenger cars and light-duty trucks.

EPA finalized revisions to its Protocol Gas Verification Program and the minimum competency requirements for air emissions testing.

EPA approved the Gila River Indian Community's tribal implementation plan to regulate air quality within the exterior boundaries of the tribe's reservation.

EPA promulgated new source performance standards and emission guidelines for commercial and industrial solid waste incineration units.

EPA established NESHAPs required for industrial/commercial/institutional boilers and process heaters at major sources

EPA promulgated NESHAPs for industrial boilers and commercial and institutional boilers at area sources.