Ключевые слова: abstract, air, bacteria, brown, carbon, clean, cleaner, climate, closeup, conditioning, cool, design, detail, dirt, dirty, dispose, dust, efficient, environment, equipment, expired, filter, filtration, flow, hand, health, hepa, home, house, household, industrial, machine, material, old, paper, particle, pm 25, pollution, protection, purification, repair, residential, retro, system, technology, texture, ventilation, virus, wall, washing,