The D.C. Circuit vacated EPA's Affordable Clean Energy Rule that repealed and replaced the Clean Power Plan as a means of regulating power plants' greenhouse gas emissions. A group of public health petitioners sought review of the rule's conclusion that §7411 of the CAA only permitted emission redu...

The Fifth Circuit denied petitions to review EPA's 2018 redesignation of Bexar County, Texas, from attainment to nonattainment and designation of three neighboring counties as attainment/unclassifiable for 2015 ozone NAAQS. Texas argued EPA only had authority to change the state's recommended design...

The Eighth Circuit affirmed, 2-1, a ruling in favor of a mining company in a challenge to the company's failure to obtain a CAA construction permit for a mine in rural North Dakota. The owners of an adjacent ranch argued that the company failed to obtain the proper permit under the CAA and failed to...

The Fourth Circuit granted for a second time an oil refinery's petition to review EPA's decision denying the refinery an exemption from biofuel requirements under the Agency's renewable fuel standard program, and vacated the Agency's decision. The refinery argued that EPA arbitrarily relied on DOE's...