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Air Pollution

Class: VIII

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AIR POLLUTION

  • The presence of one or more contaminants in the atmosphere which are injurious to human health,animal and plant life.

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MAJOR POLLUTANTS

  • Carbon monoxide
  • Carbon dioxide
  • Suspended Particulate Matter
  • Chlorofluorocarbons
  • Nitrogen oxides
  • Sulphur dioxide
  • Ozone

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SMOG

  • Caused by Industrial and Vehicular pollution.
  • Can cause respiratory diseases ,eye- irritation and even death.

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INDUSTRIAL SMOKESTACKS

  • Carbon dioxide , sulphur dioxide and other contaminants present in let-out gases cause Global warming and Acid rain .

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VEHICLE EXHAUST

  • Unburnt hydrocarbons, oxides of Nitrogen , sulphur dioxide and carbon dioxide cause Greenhouse effect.
  • This leads to Global Warming.

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EFFECTS

  • Smoke from factories & cigarettes causes harm to the lungs .
  • Carbon particles get deposited in the lung tissue.
  • This impairs the ability of the Alveoli to exchange gases.

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ACID RAIN

  • Oxides of Nitrogen & Sulphur combine with water droplets and form Acids in air.
  • These acids reach the earth’s surface along with Rain .

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PREVENTIVE MEASURES

  • Use Renewable sources of energy.
  • Chimneys in factories should be installed with Cottrell precipitators .
  • Use CNG or LPG cylinders in vehicles or Unleaded petrol & diesel .
  • Regularly check vehicle for emission .
  • Grow more trees .