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Fill in the blanks:- Burning of wood and coal causes ………. of air.
- A liquid fuel, used in homes is ……….
- Fuel must be heated to its ……….. before it starts burning.
- Fire produced by oil cannot be controlled by ……………
- Burning of wood and coal causes pollution of air.
- A liquid fuel, used in homes is kerosene.
- Fuel must be heated to its ignition temperature before it starts burning.
- Fire produced by oil cannot be controlled by water.
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