Ключевые слова: alternativeenergy, background, beauty, biology, blue, care, communication, concept, crystal, earth, eco, ecology, environment, environmental, environmentalconservation, farm, fingers, friendly, glass, global, globalwarming, globe, glowing, green, growth, hand, health, hold, hope, humanhand, land, life, map, nature, peace, people, planet, plant, protect, protection, responsibility, sky, sunlight, sustainable, tree, world,