acetic acid acetylene acrolein air safety aldehyde aluminium ammonia ammonium nitrate ammonium sulfate aromatic hydrocarbon arsenic backdraft bee smoker beekeeping benzene bromomethane by-product candle carbon carbon dioxide carbon disulfide carbon monoxide carbon monoxide poisoning carbonyl sulfide carboxylic acid cellulose chloromethane chromium cobalt colored smoke combustion copper cresol death diesel dioxin dust ethane ethnopharmacology ethylene exhaust gas fire firefighter fireplace flashover fog machine formaldehyde formic acid fumigation furfural gas guaiacol halocarbon halogen hardwood haze machine heterocyclic compound hydrogen chloride hydrogen cyanide hydrogen sulfide internal combustion engine invisibility lignin lung magic smoke methane methoxy mie theory mist naked eye nickel nitrogen oxide oil oil lamp particulate pest control phenol phosgene poison polycyclic aromatic hydrocarbon polyvinyl chloride pyrolysis refinery retene selenium skywriting smog smoke bomb smoke detector smoke grenade smoke hood smoke inhalation smoke signal smoking softwood soot sterane stove sulfur dioxide syringol tar terpene thiol toast tobacco tobacco smoking uranium vanadium visibility wikimedia commons wildfire worcester cold storage warehouse fire