Give reasons Environmental aspects must be carefully looked into before building huge dams.

(i)

• Because of the following reasons:
• Dams create an imbalance in the earth’s equilibrium.
• Deforestation leads to environmental pollution.
• People are displaced.
• Cities/villages/towns are shifted causing untold hardships to people.
• Flood threats loom large.
• Earthquake threats.
• Silting of lakes a problem.

(ii) Presence of coal mines around industries reduces the costs of transportation and also ensures easy availability of fuel.

(iii) Petroleum is a very valuable fossil fuel. It is used for running all types of machinery, transport vehicles, from a bicycle to an aeroplane.

(iv) After quarrying, pits are not covered so they may cause environmental hazards.