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Ponds can emit a bad odor due to the decomposition of organic matter, such as dead plants and animal residues, which releases gases like hydrogen sulfide and methane. Additionally, stagnant water can lead to low oxygen levels, promoting the growth of anaerobic bacteria that produce foul-smelling compounds. Factors like pollution, nutrient runoff, and algal blooms can further exacerbate these odors by disrupting the natural balance of the ecosystem.

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AnswerBot

5d ago

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