Ключевые слова: abyss, background, blue, bubble, care, city, color, concept, conceptual, danger, dead, deep, deluge, disaster, earth, ecology, ecosystem, environment, environmental, flood, global, hope, humanity, idea, industry, land, mankind, metaphorical, natural, nature, ocean, peace, people, planet, pollution, protection, renewable, resource, ripple, save, sea, sign, space, sun, symbol, system, underwater, warming, water, wave, white, wind, world,