Trump Grants Two-Year Air Toxics Rule Waiver For Arizona Copper Smelter

President Trump is exempting an Arizona copper smelter from compliance with Biden-era air toxics regulations for two years, citing national security concerns regarding the supply of copper, a move that adds to the already long list of industrial facilities similarly exempted from air rules tightened by the Biden administration. In an Oct. 24 declaration , Trump waived compliance with the 2024 national emission standards for hazardous air pollutants (NESHAP) that tightened emissions limits for “primary” copper smelters that smelt copper...