sick building syndrome, indoor air quality and pollutants concept with text against an imaginary cityscape

sick building syndrome disease indoor air quality pollutants sbs architecture magnifying glass indoors pollution home concept concepts city town smog skyline cityscape carbon monoxide asbestos radon test formaldehyde nitrogen dioxide oxide particulate matter volatile organic compounds secondhand smoke conditioning ventilation lead particles mold biological contaminants poisonous environmental tobacco stoves heaters vocs passive smoking cigarette polluting fungal household products