Here are some effective ways to reduce vehicle pollution:

1. Drive less by walking, biking, or taking public transit whenever possible, especially for short distances. Carpooling with others is also a great way to reduce emissions.
2. Use alternative fuels like compressed natural gas (CNG) or electricity. CNG-fitted vehicles can reduce emissions by 75% compared to gasoline or diesel. Electric vehicles produce zero direct emissions.
3. Maintain your vehicle regularly to keep it running efficiently and reduce emissions. Get a Pollution Under Control (PUC) certificate to ensure your vehicle meets emission standards. Properly inflating tires also improves fuel economy.
4. Avoid idling whenever you can. Idling gets 0 miles per gallon and emits pollutants unnecessarily. Turn off your engine if you will be stopped for more than a minute or two.
5. Drive at moderate speeds and accelerate gradually. Speeding and rapid acceleration burn more fuel and produce more emissions.
6. Use high-quality fuels that meet the latest emission norms. Avoid leaded gasoline which is a health hazard.

By making some simple changes to how we drive and maintain our vehicles, we can all do our part to reduce air pollution from cars and trucks. Systemic changes like better traffic management and uniform emission standards are also important.