It is type of air pollution and basically is a mixture of Smoke and fog in the air. Intensity smog is more where emissions of Burning of fossil fuels and anthropogenic are in larger amount
How smog is formed?
Visible air pollution consists of Sulphur Oxide, Nitrogen oxide and other particles. Anthropogenic smog is raised from coal combustion emissions, vehicular emissions, industrial emissions, stack emissions, forest and agricultural fires and photochemical reactions of these emissions. When sunlight and its heat react with these emission and fine particles in the atmosphere, smog is formed.
Effects of Smog on Human health
The ground level ozone present in the smog also inhibits plant growth and causes immense damage to crops and forests. Crops, vegetables like soybeans, wheat, tomatoes, peanuts, and cotton are subject to infection when they are exposed to smog. The smog results in mortifying impacts on the environment by killing innumerable animal species and green life as these take time to adapt to breathing and surviving in such toxic environments.
Smog formation time depends on the temperature. Temperature inversions are situations when warm air does not rise instead stays near the ground. During situations of temperature inversions, if the wind is calm, smog may get trapped and remain over a place for days. Smog is more severe when it occurs farther away from the sources of release of pollutants. The reason behind is that photochemical reactions that causes smog to take place in the air when the released pollutants from heavy traffic drift due to the wind. Smog can thus affect and prove to be dangerous for suburbs, rural areas as well as urban areas or large cities. Smog is often caused by heavy traffic, high temperatures, sunshine, and calm winds. These are a few of the factors behind an increasing level of air pollution in the atmosphere.
During the winter months when the wind speeds are low, it helps the smoke and fog to become stagnate at a place forming smog and increasing pollution levels near the ground closer to where people are respiring. It hampers visibility and disturbs the environment. Smog is a disturbing problem particularly due to the fast modernization or industrialization as the dangerous chemicals involved in smog formation are highly reactive is supper around in the atmosphere. Smoke and sulfur dioxide pollution in urban areas is at much lower levels than in the past, as a result of the law passed to control emissions and in favor of cleaner emission technology.
Impact of smog can be reduced by applying alterations in your standard of living, declining the depletion of fuels that are non-renewable and by substituting them with alternate sources of fuel which will reduce toxic emissions from vehicles.