Which of the following will not cause any atmospheric pollution?
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Which of the following will not cause any atmospheric pollution?
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Spraying of DDT on crops produces pollution of
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Cement factory labourers are prone to
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A river with high BOD value is
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BOD stands for
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Minamata disease was caused by pollution of water by
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The unfavourable alteration of environment due to human activities is termed as
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Which of the following is the major cause of pollution?
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Heavy dust can cause
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Which of the following is the best indicator of SO2 pollution?
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5 June is observed as
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Noise is measured using sound meter and the unit is
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