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Practice Listening: Fill in the Blanks (Type In)
ID: #33252
Short
Dam
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Dams are huge man-made structures that act as on a river. Today, the main reason people build dams is to produce electricity. They are also built to and control the flow of water in a river. Throughout history, dams have been used to prevent flooding and to farmland. Dams supply about a sixth of the world's electricity and they significantly reduce the risk of floods and . They also make water easier to access, especially in desert like areas, where water is in low supply. There are however, some negative effects of damming rivers. Many people's homes are knocked down to make space for the dam, and flooding can in the reservoir, which is the area behind the dam where water collects . This can cause valuable farmland to become submerged under the lakes.
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