A new climate regulation from California is set to disrupt the RV industry, leading to the halt of diesel motorhome sales in several states starting next year. The California Air Resources Board (CARB) has amended its Advanced Clean Truck regulations, which now require all vehicles over 8,500 pounds to be zero-emission vehicles. This stringent regulation will impact states like Washington, Oregon, New York, Massachusetts, and New Jersey, which often adopt California’s emissions standards.