Ключевые слова: abstract, anniversary, banner, bio, biology, concept, conservation, creative, day, earth, eco, ecofriendly, ecological, ecology, ecosystem, energy, environment, environmental, forest, friendly, go, grass, green, growth, idea, illustration, leaf, natural, nature, paper, planet, plant, postcard, poster, protection, recycle, reduce, responsibility, reuse, save, savings, sign, symbol, template, think, together, tree, world,