Ключевые слова: blank, business, cloud, concept, conservation, copy space, creative, eco, ecological, ecology, education, empty, environment, environmental, evening, exterior, foliage, green, growth, idea, industry, leaf, morning, mountain, nature, ocean, outdoor, pencil, plant, protection, ray, renewable, responsibility, rock, save, saving, sea, sign, sky, solution, stone, sun, sunrise, sunset, sunshine, sustainable, symbol, think, twilight,