Raw sewage would contribute to the biochemical oxygen demand of a stream and cause fewer organisms to be present.

Name: Raw sewage would contribute to the biochemical oxygen demand of a stream and cause fewer organisms to be present.
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Raw sewage increases the biochemical oxygen demand (BOD) because microorganisms use oxygen to break down the organic materials in sewage, leading to lower oxygen levels in the water, which can harm or reduce the number of aquatic organisms.

Raw Sewage Would Contribute to the Biochemical Oxygen Demand of a Stream