Ключевые слова: abstract, art, atomic, attention, background, beware, biologic, biological, bright, card, caution, chemical, colorful, danger, dangerous, decorative, design, environment, generated, graphic, grunge, harmful, hazard, illustrated, infectious, line, nuclear, old, precaution, radiation, radio, radioactive, reflection, retro, risk, safety, shadow, sign, station, substance, symbol, toxic, virus, warning, white,