Secondary sewage treatment is mainly a
READ MORE +Environmental Pollution MCQs
Eutrophication is often seen in
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An indicator species of polluted water is
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The molecular action of ultraviolet light is mainly reflected through
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Insecticides usually act upon
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Which of the following gases contribute to the global warming?
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Bhopal gas tragedy of 1984 was caused by the leakage of
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Maximum air pollution is caused by
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Common indicator organism of water pollution is
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DDT is a
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‘Ozone hole’ means
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Which of the following is a secondary air pollutant?
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