B. Chemicals in the trosposhere.
The result is smog when sulfur and nitrogen mix with oxygen and react with sunlight.
Photochemical smog is caused by the action on chemicals of sunlight.
... produced by sunlight.
Sunlight
Photochemical Smog forms when pollutants react in the presence of sunlight.
The result is smog when sulfur and nitrogen mix with oxygen and react with sunlight.
"Classic Smog" is the rich, heady mixture of fog, sulfur dioxide and coal smoke particulates that were found in London England in the early 1900's. "New Improved Smog" also known as photochemical smog is the result of nitrogen oxides and volatile hydrocarbon reacting in the presence of sunlight to form ozone, associated polycyclic aromatics and a brown haze popular in modern cities. Especially ones with lots of cars, stagnant air masses and abundant sunshine.
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
Photochemical smog is a type of smog made when hydrocarbons and nitrogen oxides mix with sunlight.
Photochemical smog is caused by the action on chemicals of sunlight.
smog is the result of pollution
Smog.
... produced by sunlight.
the action of sunlight on chemicals
Summer because photochemical smog is created by the actions of sunlight on pollutants, and sunlight is stronger in the summer than winter.
London-type smog is caused mainly by air pollution due to combustion of coal and emission of sulphur dioxide and dust. Photochemical smog is a type of air pollution produced when sunlight acts upon motor vehicle exhaust gases to form harmful substances.
They make a smog.