Ключевые слова: alarm, alert, alpha, atom, atomic, background, biohazard, black, catastrophe, caution, chemical, chemistry, contaminate, control, danger, danger icon, danger sign, dangerous, death, emblem, energy, hazard, hazardous, icon, illustration, label, material, nuclear, pictogram, poison, pollution, power, protection, radiation, radiation icon, radiation sign, radioactive, radioactivity, ray, reactor, risk, safety, science, sign, sing, symbol, toxic, warning, xray,