If there is a lack of air for the combustion process, or if the appliance is faulty, Carbon Monoxide can be produced.
Ọ bụrụ na engine adịkwaghị na ụda, ma ọ bụ usoro mmepụta ihe adịghị arụ ọrụ, nrụrụ carbon monoxide nwere ike ịdaba.