Ключевые слова: abstract, architecture, background, backgrounds, blue, building, cityscape, cloud, color, computer, conservation, design, development, environment, environmental, exterior, factory, forest, fuel, generation, graphic, grass, green, growth, ideas, illustration, industry, landscape, lawn, leaf, meadow, modern, nature, no people, outdoors, pattern, plant, power, shape, sky, skyscraper, smoke, stacks, structure, summer, technology, tree, trees,