They climb through the Brown Cloud which now covers the Asia-Pacific region -- burning kerosene, which creates even more greenhouse gasses!
In addition A full face mask respirator capable of dealing with acid and chlorine gasses and vapors may be preferable in some circumstances.
State that nitrogen and oxygen from the air react inside a car engine to form nitrogen oxides (these are poisonous gasses ).
Catalytic combustion wood stoves work to produce heat with exhaust gasses passed through a ceramic honeycomb inside the stove.
Electric is most commonly used as electric heaters do not need venting or produce fumes or dangerous gasses.