Streams are bodies of flowing water carrying water to larger water bodies, commonly rivers or oceans. In fact, rivers receive most of their water from different streams. Streams are needed for the flow of water from the point of origin to the rivers or (in some cases) from rivers to other areas. Streams are also necessary for providing water to a much larger area than rivers can cover. Streams often feed through villages or small towns and are used as sources of water supply and irrigation. In many parts of the world, streams are main sources of drinking and irrigation water. Streams can also be used for navigation. Streams also help keep water aerated as they move and naturally aeration occurs. Keeping a steady oxygen saturation level of the water is important for the organisms that inhabit it.
In many regions of the world, streams also carry the pollution load from one area to a main river or ocean.
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