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Types of Energy
Energy resources are materials or processes in nature that can be used to do work. Generally speaking, energy sources can be divided into two categories, non-renewable energy resources, and renewable energy resources. Non-renewable energy resources are resources that cannot be replenished in a short period of time (for example: oil, natural gas, uranium, coal). On the other hand, renewable energy resources are resources that can be replenished within a short period of time (for example: hydropower, wind energy, tidal energy, bio fuels).

Hydroelectric Power
The most widely used type of renewable energy is hydroelectricity. Most hydroelectric energy comes from the potential energy of dammed water driving a turbine to generate electricity, but variations of hydroelectric energy uses the kinetic energy of undammed water. Ultimately, hydroelectric power is a combination of solar energy and gravitational potential energy. Sun¡¯s radiant energy causes water to......

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