Ключевые слова: background, blue, building, business, care, circle, city, clean, concept, conservation, day, design, development, earth, eco, ecological, energy, environment, environmental, forest, fresh, global, globe, grass, green, home, house, human, landscape, life, meadow, miniature, nature, object, planet, plant, protection, resource, responsibility, road, save, sign, sky, space, sphere, sustainable, travel, tree, world,