Ключевые слова: background, building, buildings, city, cityscape, clean, dam, day, development, earth, ecology, electricity, energy, engineer, environment, environmental, expansion, flow, growth, horizon, infrastructure, lake, landscape, metro, nature, no, one, outdoor, people, plants, river, road, sidewalk, sky, skyline, skyscraper, street, summer, sun, sunlight, sunny, sunshine, sustainability, sustainable, town, traffic, trees, urban, view, water,