Ключевые слова: alternative, biological, burnt, concept, conceptual, conservation, earth, eco, ecological, ecology, ecosystem, element, energy, environment, environmental, flora, floral, forest, global, graphic, grass, green, growth, herbal, hole, leaf, life, natural, nature, organic, paper, planet, plant, pollution, protect, recycle, recycled, recycling, tree, vegetation, warning, wildlife, word, world,