Monday, May 9, 2011

The relation between urbanization and air pollution


Air pollution is the introduction of chemicals, particulate matter, or biological materials that cause harm or discomfort to humans or other living organisms or damages the natural environment, into the atmosphere. Some points are given below-
  •  Urbanization means increase of population in an area. Then they need more foods, cloths and other materials to live. To supply their needs industries are growing up by which air is polluted.
  •  More people burn more fuels which creates co2 and other gases. By this urban people pollute air.
  • More people need more vehicles for transportation. Vehicles pollute air rapidly. So air is polluted for the result of urbanization.
  • Industries are the main components of urbanization. From industries various types of gases are produced which causes acid rain.
  • For urbanization forests and many other agricultural lands are reduced. It effects badly on air.
  • Urban people use refrigerators, air cooler, perfume etc. which produce CFCs.
  • For urban people construction buildings are necessary. Air pollutes when dust particles are being mixed with air from construction works.
How water cycle balance the environmental quality:
The Earth’s water is always in movement, and the water cycle is known as the hydrologic cycle, describes the continuous movement of water on, above and below the surface of the earth. There are some processes of how water cycle balances the environmental quality:
  • The balance of water in atmosphere is controlled by water cycle. The water in atmosphere come from ocean and other water bodies by evaporation and by precipitation water is come down. By this process balance of water in atmosphere is controlled by water cycle.
  • The presence of water on earth is maintained by water cycle. Water is come down to earth surface, transported by rivers to the ocean and finally evaporated by sun heat.
  • The presence of water in the ground is maintained by water cycle. The precipitated waters go down to the ground by infiltration and this water go to the ocean through subsurface flow. Thus, the presence of water in the ground is maintained by water cycle.
  • The quantity of glaciers in poles and over mountains are controlled by water cycle.
  • While the water cycle is itself a bio geochemical cycle, flow of water over and under the earth is a key component of the cycling of other bio geochemical. 
  • Water controls the earth temperature by absorbing.
  • Water cycle maintains ecological balance by ensuring the presence of water in right time and right place.

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