Monday, October 18, 2010

Essay Question: Facts+Explanation

EFFECTS OF UNORGANISED DEVELOPMENT TOWARDS THE ECOSYSTEM

1. Soil Erosion

-Soil surface which is covered with organic compounds and tiny particles are blown

away by wind and flow together with rainwater.

2. Deforestation

- Increases atmospheric carbon dioxide level

- Effects on climate

- soil gets infertile and undergoes erosion

- Extinction of organisms

3. Landslide

- Loose land and movement of soil at steep hills causes mud and land to slide

4. Flash Flood

- Soil erosion causes sedimentation of soil in rivers

- Rivers become shallow.

- So, water will overflow riverside during heavy rain

- poor water flow in blocked drains and roads

5. Thinning of ozone layer

- Increase in exposure to ultraviolet ray causes increase in global temperature

- Melting of ice in the poles will happen

- and thus causing sea level to rise.

6. Eutrophication

- Biochemical oxygen demand (BOD) for aquatic organism increases

- Death of aquatic organisms due to oxygen depletion as the result of excess use of oxygen by bacteria for decomposition

7. Global warming

- Global temperature increases as a result of excess quantity of carbon dioxide in the atmosphere.

- Heat reflected from surface of the earth is trapped by this gas.

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