Ключевые слова: abstract, art, background, ball, business, care, clean, concept, conservation, day, design, earth, eco, ecological, ecology, ecosystem, energy, environment, environmental, forest, future, geography, glass, global, globe, grass, green, hand, life, natural, nature, organic, planet, plant, protect, protection, recycle, recycling, responsibility, safety, save, sphere, sustainability, sustainable, symbol, technology, transparent, tree, world,