Ключевые слова: alert, atom, atomic, attention, beware, black, bomb, caution, chemical, chemistry, danger, dangerous, disaster, energy, hazard, hazardous, icon, illustration, industry, nuclear, plutonium, poison, pollution, power, protection, radiation, radioactive, radioactivity, ray, reactor, risk, safety, science, sign, substance, symbol, threat, toxic, uranium, warning, waste, yellow,