Ключевые слова: art, attention, bad, bio, biohazard, building, bunker, caution, danger, deleterious, destruction, detrimenta, dirty, disaster, door, dust, factory, fuel, glow, harmful, hazardous, heat, hot, illustration, lab, laboratory, nobody, old, open, plant, pollution, problem, radioactivity, rays, red, risk, room, rusty, safety, secret, sign, station, symbol, technology, toxic, underground, unhealthy, wall, warning, yellow, zone,