Ключевые слова: air, antenna aerial, blue, buildings, chimney, circle, city, clear, conditioning, connection, day, daytime, dish, ductwork, ecosystem, engineering, environment, equipment, europe, fuel and power generation, house, hvac, industry, infrastructure, installation, metal, modern, no people, outdoors, pipes, roof, rooftop, satellite, satellite dish, satellite tv, service, sky, smoke, social issues, structure, sun, sunlight, system, technology, television sets, urban, utility, ventilation, view, weather,