This is the ozone we've all heard so much about. The ozone layer floats many miles above the earth, and protects us from the sun. Some studies indicate that this layer might be deteriorating. Ground-level ozone is bad news. Down here on the ground, we have an entirely different problem.
Ozone is produced when the emissions of cars and trucks combine with other chemicals in the air.
And, when ozone is produced at ground level, it tends to stay at ground level. That can lead to one very unhealthy problem. Ozone from cars creates smog. In a nutshell, here's what happens. Nitrogen oxides and volatile organic compounds from your auto exhaust and other sources react together in the presence of sunlight.