Addition of harmful substances such as smoke, dust, germs, bad smells etc. in the air that degrades the quality of air is called ......................
Air pollution
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15
The practice of seeking, pursuing and capturing or killing wild animals.
Hunting
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Two causes of deforestation
Requirement of wood/Conversion of forest to agricultural land/Overgrazing by cattles/ Forest fire
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Two greenhouse gases
water vapour, carbon dioxide, methane, nitrous oxide and ozone.
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The increase in average surface temperature of the earth due to trapping of sunâs heat by the greenhouse gases is known as.................
Global warming
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One preventive measures for water pollution
Non biodegradable waste materials such as plastics should not be dumped in water bodies.
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One effect of air pollution
i.It causes air borne diseases such as lung cancer, asthma, etc ii.Global Warming iii.Acid rain iv.Ozone layer depletion
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one cause of air pollution
i.Burning of fossil fuels ii.Smoke from automobiles iii.Smoke from factories and industries iv.Mining Activities
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15
Trees release_____________ which is needed for survival.
Oxygen
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Large scale plantation of saplings in a barren land is called .....................
Afforestation
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............................. provide habitat to a large number of plants, animals, birds and insects.
Forests
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we can help in the conservation of our forests by saving paper.
True
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Planting of trees on deforested land is called .....................................
