Smog is a combination of various gases with water vapour and dust.

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In fact the word smog has been coined from a
combination of the words smoke and fog.

• Smog is a combination of various gases with water
  vapour and dust.
• A large part of the gases that form smog is
  produced when fuels are burnt.
• Smog forms when heat and sunlight react with
  these gases and fine particles in the air.

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• Its occurrences are often
• linked to heavy traffic,
• high temperatures, and
• calm winds.
• During the winter,
• wind speeds are low and
• cause the smoke and fog to stagnate
• hence pollution levels can increase near
  ground level.
• This keeps the pollution close to the ground,
• right where people are breathing.

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• It hampers visibility and harms the environment.
• Heavy smog is greatly decreases ultraviolet
  radiation.
• Smog causes a misty haze similar to fog, but very
  different in composition.

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• The effects of smog on human health were evident,
  particularly when smog persisted for several
  days.
• Many people suffered respiratory problems and
  increased deaths were recorded, notably those
  relating to bronchial causes.
• It can aggravates the ground level ozone too
  which affects health of infants and senior
  citizens.

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• Ground-level ozone
• Ground-level ozone is formed by smog through a
  complex reaction involving hydrocarbons, nitrogen
  oxides, and sunlight.
• It is especially harmful for senior citizens,
  children, asthmatics, and people with heart and
  lung conditions.
• It aggravates respiratory symptoms and further
  impairs the ability of these individuals to
  perform normal activities.
• It can inflame breathing passages, decreasing the
  lung's working capacity, and causing shortness of
  breath, pain when inhaling deeply, wheezing, and
  coughing.
• It can cause eye and nose irritation and dry out
  the protective membranes of the nose and throat
  and interfere with the body's ability to fight
  infection, increasing susceptibility to illness.

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The Legislation to control pollution emissions
and cleaner emission technology alone can help us
from the perils of Smog and Air Pollution
The End