Ключевые слова: alert, alpha, atom, atomic, attention, background, beware, black, bomb, button, caution, contamination, danger, dangerous, death, energy, gamma, gradient, hazard, icon, industrial, industry, long shadow, nuclear, orange, power, quarantine, radiation, radio, radioactive, radioactivity concepts, ray, risk, safety, science, sign, station, symbol, toxic, uranium, war, warning, waste, yellow,