Ключевые слова: abstract, background, bio, business, concept, conservation, earth, eco, ecology, education, energy, environment, environmental, environmentally, friendly, global, go, grass, green, growth, hand, holding, idea, innovation, isolated, man, natural, nature, paper, people, person, planet, plant, protection, recycle, recycling, responsibility, reuse, save, sign, sustainability, sustainable, symbol, text, think, thinking, tree, white, word, world,