Idle reduction equipment vehicle emissions control is aimed at reducing the amount of energy wasted by an idling trucks, rail locomotives or automobiles. When a vehicle's engine is not being used to move the vehicle, it can be shut off entirely—thereby conserving fuel and reducing emissions—while other functions like accessories and lighting are powered by an electrical source other than the alternator. Each year, long-duration idling of truck and locomotive engines emits 11 million tons of carbon dioxide, 200,000 tons of oxides of nitrogen, and 5,000 tons of particulate matter into the air.