absorption boy breath child danger face filter filtering gas mask head kid mask military equipment pollution protect safe security soviet toxic war area cigarettes direction environment health health risk no smoking no smoking in this area sign not allowed prohibition sign unhealthy warning broken bulbs debris disposal dumping ground dumpsite electricity electronic energy environmental glass lamps light lightbulb lights quicksilver rubbish save saving throwaway society waste abstract abstracts atmosphere background backgrounds chaos desktop dying planet earth ecology fill futuristic global warming globe grunge grungy outer space save the planet sci-fi science fiction shapes smog textures wallpaper World chimney clouds contrast factory grass heat industry lake lawn lillies lilly nature park plant Poland pond power shore sky tree trees warsaw wilanow appropriate behavior appropriate behaviour no spitting not permitted penalties permission denied prohibited spit spitting no smoking sign