A low emission vehicle (LEV) is a vehicle that emits less than 193 g/mile of CO2. Carbon Dioxide (CO2) is the pollutant that has the highest impact on the environment. Other toxic substances that vehicles emit include sulfur, carbon monoxide (CM), nitrous oxide (NOX), and hydrocarbons (HC). Aside from LEVs, there are several additional categories that further determine the level of emission of a vehicle: ultra-low emission vehicle (ULEV), super-ultra-low emission vehicle (SULEV) and zero-emission vehicle (ZEV).
Vehicles that meet SULEV standards include Honda Insight and Toyota Prius, as well as the Ford Focus SULEV variant. However, with the enormous advances in technology we are witnessing today, the goal is to produce as much zero-emission vehicles as possible, and many car makers already invest a lot of money doing just that. Zero-emission vehicles are electric and hybrid cars, that are in use nowadays.
Electric vehicles run on electric motors, that are powered by rechargeable batteries. They emit no pollutants and work quietly, thus contributing to reducing noise pollution, as well. Downsides to this technology is that electric vehicles get significantly lower mileage than gasoline-powered vehicles by as much as 50%, and the time