Dredging serves four general purposes:
2) Dredging is used to catch seafood. This type of dredging involves dragging a metal mesh net along the bottom of the ocean floor or other large body of water to catch animals such as crabs, fish and squid.
3) Dredging is performed in the attempt to remove pollutants and invasive species of plants from a particular body of water, although this practice is controversial. Removing pollutants this way often causes other environmental problems such as the destruction of habitats of important plant and animal species.
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Dredging. What is Dredging? Definition and Purpose