1. The sun, water, and the wind are alternative sources of energy. The wind turns and moves sailboats. It is a clean source of energy, and there is of it. Unfortunately, if the wind does not , there is no wind energy. When water moves from a high place to a lower place, it makes energy. This energy is used to create . Water power gives energy without pollution. However, people have to build dams to use this energy. And as dams a lot of money, water energy is expensive.
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