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2%
1%
3%
None of these
Oxygen
Nitrogen
Carbon dioxide
Air
Wind
Atmosphere
Components of air
Moving air
Water vapour
Medium speed
High speed
Low speed
Transpiration
Evaporation
Respiration
Condensation
Fire
Smoke
Due to excess of carbon-dioxide
Due to excess of oxygen
Due to excess of water vapour
Due to excess of nitrogen
Glass
Plastics
Metals
All of these
Nutrients
Vitamin
Calcium
Protein
Land fill
Biodegradable substance
Non-biodegradable
Compositing
Fertile
Non-fertile
Clayey
Sandy
Blue
Red
Green
Both (a) and (c)
Kitchen wastes
Plants wastes
Animal wastes
Egg shells
Sea shells
Gizzard