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प्रश्न
Define ‘eutrophication’.
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उत्तर
Eutrophication: “Organic matter in sewage poured into water bodies generally results in excessive growth of algae – which deoxygenates water and produces deadening atmosphere there.”
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संबंधित प्रश्न
Explain how the peculiar variation of density of water with temperature can cause water— pipes to burst in very cold places.
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Give the importance of dissolved minerals & salts.
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________ of water is in oceans and seas.
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What is the source of water in the following?
Wells
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Fill in the blanks selecting words from the following list
snow, rain, clouds, vapour, evaporation, transpiration.
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