Fish die in water polluted by sewage due to
Pathogens
Reduction in O2
Clogging of gills by silt
Foul smell
Additional Questions
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Ozone layer of upper atmosphere is being destroyed by |
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Noise pollution is measured in |
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Acid rain is caused by increase in the atmospheric concentration of |
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In an area where DDT had been used extensively, the population of birds declined significantly because |
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Biochemical Oxygen Demand (BOD) in a river water |
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Montreal Protocol aims at |
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dB is a standard abbreviation used for the quantitative expression of |
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Shell of egg in bird becomes thin (not properly formed) due to the pollution of pesticides. This is due to interference in the activity of : |
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Which one of the following pairs of gases are the major causes of "Greenhouse Effect"? |
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BOD is connected with |
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