Ключевые слова: abstract, background, bio, biology, building, car, city, concept, craft, creative, cut, design, earth, eco, ecologic, ecological, ecology, education, energy, environment, environmentally, friendly, globe, green, hand, holding, home, icon, idea, leaf, lightbulb, natural, nature, paper, people, planet, power, protection, recycle, reduce, responsibility, reuse, save, savings, sign, sustainability, symbol, think, together, tree, world,