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

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