Ключевые слова: aged, alarm, alert, atomic, attention, background, beware, black, care, caution, danger, dark, design, dirty, disaster, emblem, energy, environmental, fuel, green, grunge, hazard, icon, illustration, industrial, logo, nuclear, old, pollution, power, protection, radiation, radioactive, radiology, risk, rough, rusty, safety, science, scratched, security, sign, stain, symbol, technology, texture, threat, war, warning, waste,