sick building syndrome concept image with he most common dangero

air architecture asbestos bacteria biological building carbon cigarette compounds concept concepts conditioning construction contaminants dioxide disease dust environmental formaldehyde fungal germs heaters home household indoor indoors industry lead matter mite mold monoxide nitrogen organic oxide particles particulate passive pesticides poisonous pollutants polluting pollution pressed products quality radon secondhand sick smoke smoking stale stoves syndrome test tobacco vapors ventilation vocs volatile wood