Smog is a result of a combination of photochemical reactions which involve: 1. Ground-Level Ozone (made from VOCs) 2. Nitrogen oxides. 3. Peroxyacytyl Nitrate (a dangerous gas). 4. Dirt and matter...
Photochemical smog is composed of many different compounds, but the three major ones are ozone, PAN and VOCs (Volatile Organic Compounds).
Ozone is written as O3 and is the product of the following...