Ключевые слова: accident, air, background, blue, breath, breathing, build, builder, building, care, caution, chemical, construction, copy, danger, design, device, dust, equipment, face, filter, gas, gear, health, industry, light, mask, nobody, object, one, oxygen, pollution, protection, protective, reaction, regulation, respiration, respirator, respiratory, safe, safety, save, security, space, technology, text, toxic, virus, work,