Ключевые слова: alert, art, atom, atomic, background, bright, caution, chemical, chemistry, contaminate, contour, danger, energy, glowing, green, hazard, hazardous, icon, illustration, industry, isolated, light, line, linear, lineart, neon, nuclear, outline, plutonium, pollution, power, purple, radiation, radioactive, radioactivity, ray, reactor, risk, safety, science, sign, substance, symbol, toxic, uranium, warning,