A district court held that fluoridation of water at 0.7 milligrams per liter (mg/L), the level presently considered “optimal” in the United States, posed an unreasonable risk of reduced IQ in children. Anti-fluoride groups and individuals had petitioned EPA under TSCA to regulate the fluoridatio...

A district court denied industry groups' motion for summary judgment in a challenge to California's adoption of an emissions regulation for railroads operating within the state. The groups argued that the regulation, which would require companies to phase out locomotives that are more than 23 years ...