Ключевые слова: abstract, alert, atomic, attention, background, beware, biohazard, caution, danger, design, dirty, grunge, hazard, hazardous, illustration, industry, ionizing, isotope, label, mark, material, notice, nuclear, old, orange, poisonous, pollution, protection, radiation, radioactive, radioactivity, radioisotope, reactor, reflect, reflected, restricted, risk, rusty, safety, sign, stain, symbol, technology, triangle, uranium, warning, waste, water, worn, yellow,