Gravity and an electrical motor (generator)
Yes.
Pakistan Venezuela and Brazil have the biggest hydroelectricity plants, but in 2009 the Popular Republic of China is going to finish the "Three Gorges" project, by doing it so, the biggest Hydroelectricity plant ever build.
So long as there is enough water to run the turbines.
convert energy from falling water to electrical energy?
Hydroelectricity does not contribute to global warming.
hydroelectricity is used to create electricity.
What is a sentence with hydroelectricity
Hydroelectricity pollutes all the water it uses.
There are some nice drawings that can be had by following the link. it is very intresting how the things work
The best thing to do to save hydroelectricity is to conserve water.
The original source of energy for hydroelectricity is water.