Answer:
Asthma and lung cancer ----------- 1% of air
Air sacs -------------- birds
Earthworms ------------- Breathes through skins
Needed for burning ------------- Oxygen
Sun rays entering dark room ------------- Dust in it
Noble Gases , water vapours -------- air pollution
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Answer:
Asthma and lung cancer ----------- 1% of air
Air sacs -------------- birds
Earthworms ------------- Breathes through skins
Needed for burning ------------- Oxygen
Sun rays entering dark room ------------- Dust in it
Noble Gases , water vapours -------- air pollution