The Ninth Circuit affirmed in part and reversed in part a district court's dismissal of a suit challenging an automobile company's use of diesel-cheat devices to evade compliance with federally mandated emission standards.

The Ninth Circuit vacated EPA's 2018 decision to conditionally register three dicamba-based herbicides designed to be sprayed on genetically engineered soybeans and cotton. Nonprofit groups argued the decision violated the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA).

A district court vacated DOI's decision to enter into a land exchange agreement to facilitate construction of a road through Izembek National Wildlife Refuge in Alaska.