What pollutants do trucks emit?
Large trucks are mostly powered by diesel engines, in contrast to cars which are mostly powered by gasoline engines. Diesel engines emit the same pollutants as gasoline engines except that they produce much higher amounts of NOx and PM2.5 and lower amounts of VOCs and CO. Diesel PM is considered particularly harmful because the particles are extremely small and can be inhaled easily. See our page on Pollutants that Vehicles Emit for more details.
