because smog contains dirty particles which is came from the smoke of vehicles.
The original ten was smog for SMoke + fOG. With more modern events where the effect is caused by the action of sunlight and ozone on chemicals or auto exhaust and fog it is often referred to as Photochemical Smog
It does not have water in it like fog does. Hope it helps- Roxas riku
smog = Smoke + fog it is created when the fog mixes with the pollution in air. Smog looks almost like fog, but is harmful if inhaled for a sufficient period of time.
The word "smog" is a portmanteau of smoke and fog.
smoke + fog = smog
smoke / fog = sm-og = smog
Classic smog is combination of smoke and fog. Modern smog, more properly called photochemical smog, is mixture of nitrogen oxides, PAHs, ozone and reactive hydrocarbons
The original ten was smog for SMoke + fOG. With more modern events where the effect is caused by the action of sunlight and ozone on chemicals or auto exhaust and fog it is often referred to as Photochemical Smog
smog
Smog, is the scientific word, for the combination of smoke and fog.
Smoke and fog together generally form smog.
Smog is not black. The original smog in London England was formed of sulfur dioxice from coal smoke and fog (hence the name) and was, at best greyer than ordinary fog. The present photochemical smog, formed from automobile exhaust and nitrogen oxides in the presence of sunlight, is brownish yellow when dense enough.