What is smog and how is classical smog different from photochemical smog?
The combination of smoke and fog is called smog. It is labelled under a type of air pollution and is found in various cities and countries throughout the world. Classical smog is found in the cool humid climate and is also often termed as the reducing smog. On the other hand, photochemical smog is found in warm and dry sunny climates and contains high levels of oxidising agents. This is the reason it is termed oxidising smog.