California

According one report of The American Lung Association (ALA) just released "State Of The Air" report listing the most polluted cities in the United States. Of the seven worst cities ranked as having the worst air quality, six -- including Los Angeles - are in California, despite the state having the toughest regulations in the country. Why is this?

The two biggest air pollution culprits are transportation sources such as cars and trucks and stationary sources such as oil refineries and industrial facilities. The ALA rankings look at two different pollutants: ozone (smog) and fine particulate matter. Take the first step and take your vehicle to the STAR stations to be carried out necessary checks.

Ground-level ozone is formed when nitrogen oxides and volatile organic compounds "cook" in sunlight to produce ozone. This mix of chemicals largely stems from the burning of fossil fuels: the pollution that comes from o…