Isnt ozone the same as smog?
No. Smog, the brown haze seen over cities under thermal inversion, is caused by air pollution, mainly nitric oxide, emitted from gas or diesel engines or power plants. High temperatures and bright sunlight can cause the nitric oxide molecule to break apart, leaving a free oxygen atom to combine with the oxygen in the atmosphere to form O3. Ozone/activated oxygen, is a highly reactive, unstable gas, which reverts rapidly to oxygen (O2). Just as an elevated white blood cell count tells your doctor that you have an infection, so an elevated ozone count is an indication of a high pollution level. The high white blood cell count is the symptom, not the cause. A high ozone count is also a symptom, not the cause of air pollution.