Why do we say that 'burning of fuel' can cause 'health hazards'?

1.	Why do we say that 'burning of fuel' can cause 'health hazards'?
Answer» Hi..... After burning of carbon fuel UNBURNT carbon particles result in the formation of carbon monoxide gas.in highly poisonous and external y suffocating,it causes BREATHING and RESPIRATORY PROBLEM,it may also proved to be fatal on this way burning of fuel can cause health hazards. hope it will HELP u.. :-)

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