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Beavers and humans build dams. Beavers build low dams with sticks,
branches, and mud. Humans use earth, rock, and concrete to build very high
dams. Beavers build a stick lodge right next to their dam. Humans build a
hydroelectric plant next to their dams. The dam and lodge protect the beaver
from its predators. Human dams protect people from floods and provide
water for irrigation. ........................
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14y ago
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Q: What materials are used to build dams?
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