Ключевые слова: ball, blue, care, color, concept, conceptual, earth, eco, ecology, ecosystem, environment, environmental, global, globe, green, hand, harmony, hold, hope, human, humanity, industry, land, map, metaphorical, nature, ocean, palm, peace, people, planet, pollution, protection, recycle, recycling, renewable, renewal, save, sign, space, symbol, system, warming, white, world,