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Hydroelectric Power.
A large river which
falls down a steep slope
is suitable for generating
hydroelectric
power.
The river is dammed at the top and
the valley is flooded
creating a large reservoir (lake) of
water.
The water is let out through turbines at the
bottom of the dam.
The turbines turn a generator which produces electricity.
The original
source of the energy is the
Sun
which makes the wind
blow and the rain fall.
Gravity causes
the falling water to turn the
turbines.
Advantages of hydroelectric power.
1. It is renewable.
2. It is readily available.
If you need more energy,
you just let out more water through the turbines.
3. It does not cause pollution.
Disadvantages.
1. Flooding the river
valley will destroy the
local habitat
for many of the species which live
there.
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