Ключевые слова: abstract, active, alert, atom, atomic, background, black, caution, chemical, chemistry, circle, contaminate, contamination, danger, dangerous, design, energy, environment, hazard, hazardous, icon, illustration, industry, isolated, material, nuclear, plutonium, poison, pollution, power, protection, radiation, radioactive, radioactivity, ray, reactor, risk, safety, science, sign, substance, symbol, toxic, uranium, war, warning, waste, white, yellow,