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Power Systems
Photovoltaic (PV) cells convert sunlight into electricity. On a
small scale, PV provides electricity for lighting, refrigeration,
and other services to households and businesses in many countries.
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Telecommunication
Uneven heating of the Earth's surface causes the wind to blow.
Many societies have long taken advantage of this energy to travel
great distances and perform diverse tasks such as grinding, sawing
and pumping water.
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