Question

how is smog formed ?it is of how many types​

Answer 1

Answer:

smog is produced when sunlight reacts with nitrogen oxides and at least one volatile organic compound (VOC) in the atmosphere. Nitrogen oxides come from car exhaust, coal power plants, and factory emissions. ... When sunlight hits these chemicals, they form airborne particles and ground-level ozone—or smog.

At least two distinct types of smog are recognized: sulfurous smog and photochemical smog. ... This type of smog has its origin in the nitrogen oxides and hydrocarbon vapours emitted by automobiles and other sources, which then undergo photochemical reactions in the lower atmosphere