Ключевые слова: architecture, background, building, business, cartoon, chemical, chimney, clip art, color, complex, concept, construction, design, ecology, emission, energy, engineering, environment, environmental, exterior, factory, flat, graphic, icon, illustration, industrial, industry, isolated, manufacture, manufacturing, nuclear, pipe, plant, pollutant, pollution, power, production, sector, sign, smoke, station, structure, style, symbol, tower, urban, white, wind, windmill,