The D.C. Circuit vacated in part EPA's 2019 rule lifting seasonal restrictions on the sale of higher-ethanol fuel. Petroleum industry groups challenged a specific section of the rule, in which EPA announced a new interpretation of when limits on fuel volatility under §7545(h)(4) of the CAA could be...

The Ohio Supreme Court affirmed an appellate court ruling in a lawsuit concerning Volkswagen’s efforts to cheat U.S. diesel emissions tests. Ohio sued the company, arguing its post-sale tampering with emissions control systems violated the state’s Air Pollution Control Act (APCA). The company mo...