What causes smog and ozone pollution?
When fuel in the engine doesn t burn completely, hydrocarbons are emitted into the atmosphere. Ground-level ozone pollution a major component of smog is formed when hydrocarbon emissions interact with sunlight and oxides of nitrogen (NOx). NOx can form when nitrogen and oxygen atoms in the air react to the high pressure and temperature in an engine. (Catalytic converters are used to reduce NOx in the exhaust.) What can I do to drive clean across Texas? • Use the proper type of oil and gasoline for your vehicle, and change oil regularly. • Get a complete car tune-up every year. • Replace or clean your air filter and spark plugs, following manufacturer s recommendations. • When a dashboard light reads “Service Engine Soon” or “Check Engine,” have your vehicle checked. By investigating a potential problem early, you could avoid a major repair bill. • Look for vacuum lines or electrical connections that are loose or cracked. Also check for corroded air intake and exhaust pipes. • Avoid idl
