See also:

Three-way catalyst
The three-way catalyst is an emission control device installed in the exhaust system. Exhaust gases in the three-way catalyst are burned at high temperatures to help reduce pollutants. ` ...

Styling
The Sentra's tall stance and short hood and trunklid make the car look a bit stubby in profile. It's not nearly as sleek as the Civic, which is still futuristic looking even though it's been aroun ...

Reformulated gasoline
Some fuel suppliers are now producing reformulated gasolines. These gasolines are specially designed to reduce vehicle emissions. NISSAN supports efforts towards cleaner air and suggests that ...