Air polluction for environmental studies

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  • 2. Pollution Water AirNoise
  • 3. Air Pollution
  • 4. • Any visible or invisible particle or gas found in the air that is not part of the original, normal composition.
  • 5. Air pollution is defined as the presence of unwanted and undesirable foreign particles and gases in the air which may have adverse effects on human beings , plants , vegetation's and important structures. Air pollution is of public health concern and can occur as : 1. Indoor air pollution Micro scale 2.Outdoor air pollution Meso scale 3.Air pollution at global level Macro scale
  • 6. CLASSIFICATION OF AIR POLLUTANTS Based on Origin Primary air pollutants Secondary air pollutants Based on states of matter Gaseous air pollutants Particulate air pollutants Based on presence in environment Indoor air pollutants Outdoor air pollutants
  • 7. CLASSIFICATION OF AIR POLLUTANTS I. Classification based on Origin of pollutants: • Primary air pollutants: Primary air pollutants are those which are directly emitted from the source into the atmosphere, and remains in the same form in the atmosphere. For example: Sulphur oxides, Nitrogen oxides, Carbon monoxide, etc. The air pollutants are emitted by man made sources like, transportation, fuel combustion, industrial operations, etc. • Secondary air pollutants: Secondary air pollutants are those which are formed by chemical reactions among primary pollutants and atmospheric chemical species. For example: Ozone, Sulphur trioxide, Ketones, etc. II. Classification based on states of matter: • Gaseous air pollutants: Gaseous air pollutants are those air pollutants which are found in the gaseous state at normal temperature and pressure in the atmosphere. For example: Carbon-monoxide, Carbon-dioxide, Nitrogen oxides, Sulphur oxides, etc.
  • 8. • Particulate air pollutants : Particulates are finely divided, air borne, solid and liquid particles, which remain for very longtime in air, in suspension. Depending on their size and mode of formation, particulate air pollutants are further classified as below: • Aerosols: These are air borne suspensions of solid or liquid particles smaller than 1 mm size. Example: dust, smoke, mist, fume, etc. • Dust: It consists of small solid particles (size 1 to 200 micro-meter) and are generated by material crushing, grinding or blasting. • Smoke: They are also fine solid particles of size around 0.1 to 1 micro-meter, formed by the incomplete combustion of organic matter like coal and wood. • Mist: It consist of liquid droplets of size around 0.1 to 10 micro-meter and formed by the condensation of vapours in the atmosphere. • Fog: If the mist is made up of water droplets at high concentration so as to obscure vision then mist is called as fog. • Soot: These are the carbon particles impregnated with tar, and released by the incomplete combustion of carbonaceous materials.
  • 9. • Classification based on presence in environment: • Indoor air pollutants: The air pollutants which are generated from households are called indoor air pollutants. For example: Cleaning agents, Pesticides, Paints, Glues, gases from stoves, etc. • Outdoor air pollutants: The air pollutants which are generated outside the buildings are called outdoor air pollutants. For example: Automobile pollutants, Industrial pollutants, Mining pollutants, etc.
  • 10. Natural : forest fires, pollen, dust storm, foul gases etc. Unnatural : man-made; coal, wood and other fuels used in cars, homes, and factories for energy. Sources
  • 11. How Why A cloud of smoke from the exhaust of a vehicle Increasing traffic Industrialization Growing cities Apathetic people Rapid economic development Cigarette smoke Burning leaves
  • 12. How • Toxic substances dissolve in water or gets deposited on the bed. • Toxic substances enter lakes, rivers, streams, etc. • Pollutants go down into the ground. Sources • City sewage • Industrial waste • Agricultural run- off
  • 13.  According to W.H.O, an increase in any of the constituents of the atmosphere which is harmful to the living beings and their environment, is known as air pollution The view from the space
  • 14.  Photo Chemical Smog  Photo Chemical Smog
  • 15. Burning of Fire Wood Chimneys
  • 16.  Effect on human health  Effects on vegetation.  Effects on building and monuments. Effects of Air Pollution St. Paul Cathedral
  • 17. Causes by air pollution
  • 18. •Learn more; stay up to date •Tellyour friendsand familyabout pollution. •Make sure get pollutionchecks onour cars. •Joina groupto stop pollution. •Encourage yourparents to carpool to work. •Switch offlights,fan, heat,etc.whenyouleave the room.  Solution for Air pollution:-
  • 19.  Air pollution can be controlled by a thorough understanding of its causes.  Establishment of industries away from the towns and cities.  Increasing the length of the chyeysmn in industries.  Growing more plants and trees.  Use of efficient engines in automobiles.  Use of smokeless choola.  Use of petrol without lead (Unleaded petrol)
  • 20. . The UNO must stop nuclear tests
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