it is bcoz in a hydroelectric power station, fast flowing water spins the turbines. On a wind farm, the wind turbines spin due to fast wind and in the sea, in the sea, waves and the tide can be used to make a turbine spin.
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Because often power stations get electicity from waves :)
for safety reasons and because the steam produced exists the system and goes back into the water to be reused :p
Yangtze River in China has three Gorge Dams built. It is to keep the floods down and to keep the cities safe.
about fifty
They built dams.
There are many river dams, many are built to create hydro power.
By building dams - for example, the construction of the Aswan Dam in the 1960's meant that from 1970 the annual flood was controlled.
dams built on river indus are: kalabagh barrage taunsa barrage guddu barrage sukkur barrage kotri barrage jinnah barrage chashma barrage
The Colorado River/Colorado River Basin has more than twenty major dams in the river system. However, the Columbia River System has more than four-hundred dams for hydroelectricity and such.
none There are probably about 29 dams.
europe
whats the point in putting the qustion on with no answer
The three gorges dams.
the dam built on jhelum is mangla dam