Question

4. Why do we say that "burning of fuels can cause 'health hazards'?
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Answer 1

Explanation:

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When we burn fossil fuels, it produces many harmful gases which spread into the environment and affect the health of living beings. For example, carbon fuels like coal, petroleum etc when burnt produces unburnt carbon particles in the environment. ... Thus, we can conclude that burning of fuels causes health hazards.

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Answer 2

Answer:

because :

1.increase of fuel led to harmful effects on environment

incomplete combustion of fuels produces carbon monoxide gas which is highly poisonous gas