Ключевые слова: abstract, background, blue, boiling, bubble, clean, closeup, conservation, cost, depth, drink, drop, droplet, drought, earth, economizing, enough, faucet, global, guardianship, head, hot, indemnification, indemnity, life, light, liquid, meter, nature, not, pipelines, pipes, pollution, prevention, productivity, protection, rain, reduce, save, sea, shower, splash, surface, tap, transmission, warming, wash, water, weather, world,