California's car industry is moving away from fossil fuels, with Cummins unveiling the X15N 15-liter natural gas engine designed to disrupt the heavy-duty truck market. The engine boasts impressive power and torque specifications, rivaling diesel engines. It offers environmental benefits with lower emissions and a decrease in greenhouse CO2 emissions. Cummins is focusing on a lower-cost, fuel-agnostic engine architecture to operate with natural gas, hydrogen, and diesel. The X15N engine is compatible with both CNG and LNG systems, offering advantages for long-haul trucking with possible endurance of up to 1000 miles on a single fill. Cummins is also developing hydrogen engines as part of its platform program aimed at reducing emissions and achieving a 100% zero-emission vehicle fleet by 2030–2035.