Ключевые слова: abstract, air, alternative, background, black, blue, bright, building, chemical, circle, city, clear, climate, cloud, clouds, color, detail, ecology, electricity, energy, engineering, environment, environmental, equipment, exhaust, factory, flection, fuel, gas, green, heat, high, industrial, industry, landscape, light, metal, modern, new, old, outdoor, outdoors, pipe, plant, pollution, power, scenic, shiny, show, silver, sky, smoke, steam, steel, summer, sun, sunlight, sunny, system, technology, temperature, tower, tube, view, white, wind,