The D.C. Circuit held that EPA erred in how it interpreted and used the “inadequate domestic supply” waiver in the Renewable Fuel Standard law when setting low renewable fuel volumes for 2014-2016. In December 2015, EPA promulgated a rule establishing volume requirements and the resulting percen...

The D.C. Circuit held that EPA must justify emissions limits set for certain hazardous air pollutants. The CAA requires EPA to set limits for seven different hazardous air pollutants (HAPs). In 2015, the Agency claimed to have identified sources of these pollutants and set emissions limits for them....