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In the last century, people began to use the great power of the wind and the sun to produce electricity. Giant fans can be attached to electrical generators. An electrical generator is a machine that creates electricity when it turns. When the wind blows, the fan turns the generator. This is a good way to create electricity. Unlike burning coal or oil, wind energy does not create pollution. And the wind will always blow.
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When the wind blows, _______.
wind energy does not create pollution.
people began to use the great power of the wind.
fans can be attached to electrical generators.
the fan turns the generator.