What we typically call smog is primarily made up of ground-level ozone.
Ozone can be good or bad, depending on where it is located.
Ozone high above the Earth, known as the ozone layer, protects human health and the environment from ultraviolet radiation. Ground-level ozone can have harmful effects on plants and animals and can cause respiratory and other health problems for each of us. Because heat and sunlight are also important factors in ground-level ozone formation, ozone pollution is primarily a concern from April through October. Regulations, ranging from tough vehicle inspection standards to restrictions on how businesses operate, are now required in our area. As this area continues to grow, ozone levels may also climb.