Maximum deposition of DDT will occur in
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Decomposition of domestic wastes under natural processes is called
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Which one of the following is not normally a pollutant?
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Eutrophication is often seen in
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Ultraviolet radiation from sunlight causes the reaction that produces
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DDT is a
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Contamination of water with sewage is indicated by cysts of
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The two gases making highest relative contribution to the greenhouse gases are
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Which of the environmental pollutions can cause birth defects?
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Which one of the following is not a bioindicator of water pollution?
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