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प्रश्न
How has DDT caused decline in bird population?
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उत्तर
High concentrations of DDT disturb calcium metabolism in birds, which causes thinning of eggshells and their premature breaking, eventually causing decline in bird populations.
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संबंधित प्रश्न
What are the various constituents of domestic sewage?
Lichens indicate SO2 pollution because they ______.
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