hand write a check list of indoor air pollutants - concept against the purity of a natural background

air quality indoor radon environmental tobacco smoke sea water biological contaminants carbon monoxide nitrogen oxide household cleaning products formaldehyde passive smoking secondhand pollution cigarette radot test schedule list checklist check indoors pollutants polluting fungal mold mite dust home domestic life asbestos stale vapors condensation chemical fumes bacteria germs damage contaminates danger hand dioxide