Ключевые слова: alert, atomic, attention, background, beware, biohazard, button, caution, contamination, danger, dangerous, design, dirty, grunge, hazard, hazardous, icon, illustration, industry, isolated, isotope, label, mark, material, notice, nuclear, old, poisonous, polution, protection, radiation, radioactive, radioactivity, radioisotope, reactor, restricted, risk, rusty, safety, sign, stain, symbol, technology, uranium, warn, warning, waste,