Ключевые слова: against, alert, atom, attention, bio, biohazard, biologic, biological, biology, black, caution, chemical, cloud, cloudscape, danger, dangerous, destroy, disaster, element, environment, epidemic, hazard, health, icon, illustration, industry, isolated, laboratory, nuclear, power, radiation, radioactive, risk, safety, science, security, shape, sign, simple, sky, symbol, technology, toxic, virus, warning, weapon, weather, word,