Fill in the blanks:
(a) Burning of wood and coal causes pollution of………………... air.
View AnswerPollution
(b) A liquid fuel, used in homes is………………....
View AnswerLPG (Liquid Petroleum Gas)
(c) Fuel must be heated to its ………………. before it starts burning.
View AnswerIgnition temperature
(d) Fire produced by oil cannot be controlled by……………..
View AnswerWater
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