2, gaseous pollution source: The gaseous pollution source in indoor air (also have mephitis photograph thing namely) include carbon monoxide, carbon dioxide, formaldehyde and organic steam. Gaseous pollution source basically comes from housing materials (formaldehyde) , copycat (ozone) , cigarette smoke (nicotine) , cleaner (cresol) , solvent (toluene) with products of combustion (sulfur oxide, lead) etc, ministry branch is adherent be eliminated on grain content, major conference by lung of air suction opening. Medicine confirms these gaseous state pollute a source is to cause the main reason of block of pneumonic, bronchitic, chronic lung and lung cancer.
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