Give the disadvantage of generating hydroelectricity.
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DISADVANTAGES:
due to the construction of dams, large areas of vegetation gets submerged. the submerged vegetation decays under anaerobic conditions and gives rise to methane , a greenhouse gas.
the concrete used during construction produces green house gases.
highly expensive construction
problem of rehabilitation of displaced people
large eco systems are destroyed
affects aquatic life, plants and animals
can be constructed only at limited sites
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disadvantages of hydroelectricity
causes of drought ,floods in lower areas, shortage of water supply
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