Ключевые слова: africa, ball, business, care, communication, concept, conceptual, continent, country, crystal, design, dew, earth, eco, ecology, environment, environmental, eurasia, europe, field, geography, glass, global, globe, grass, green, leaf, life, light, moss, natural, nature, north, organic, planet, plant, protect, recycle, recycling, space, sphere, sunlight, symbol, transparent, water, world,