Ключевые слова: bacterial, biohazard, biological, biology, chemical, chemistry, colors, concept, contagion, danger, dirty, environment, environmental, equipment, experiment, garbage, hazard, hazardous, healthcare, industrial, industry, label, laboratory, medical, medicine, microbiology, objects, poisonous, pollution, protection, protective, radiation, research, safety, science, scientific, sign, substance, toxic, warning, waste,