Iowa Attorney General Brenna Bird has joined a coalition of states urging the EPA to deny California's request for a waiver to implement its Advanced Clean Fleets regulation, which mandates a transition to electric trucks. The regulation, which would ban the sale of larger diesel vehicles by 2036 and internal-combustion engines by 2045, has raised concerns among several states about its potential to disrupt the trucking industry and inflate consumer prices. Critics argue that California's mandate could force trucking companies nationwide to comply with California's regulations, thereby impacting the supply chain. Oklahoma's Attorney General Gentner Drummond and the American Trucking Associations have echoed these concerns, stating that the regulation overreaches and fails to consider available technology. Additionally, a recent lawsuit led by a coalition of states challenges the legality of the EPA's authority to enforce such sweeping regulations under the Clean Air Act. This coalition maintains that California should not dictate rules that affect the entire nation.