Highest percentage of air consists of
Oxygen
Carbon dioxide
Nitrogen
Argon
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Chlorofluorocarbon is used in
Refrigerators
Air conditioners
Perfumes
All
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CNG is a
Polluted fuel
Clean fuel
Harmful fuel
None
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Green House gas is
Nitrogen
Oxygen
Methane
Carbon dioxide
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The percentage of nitrogen is
21%
78%
12%
87%
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What causes pollution
Human activities
Trees
Both of these
None of these
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Air pollution causes
Global warming
Respiratory problems
Soil erosion
None of these
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Most polluted river in the world is
Yamuna
Cavery
Chenab
Ganga
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Pollution of water is responsible for
Oil refineries
Paper factories
Sugar mills
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The Taj Mahal is being affected by
Noise pollution
Air pollution
Water pollution
None of these
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