Ключевые слова: asphalt, avenue, canal, circle, city, clean, close, cover, design, development, dirty, dowtown, drain, drainage, environment, flood, gray, ground, heavy, hole, hygiene, infrastructure, maintenance, manhole, metal, ordinary, rain, road, round, sanitation, sanity, sewage, sewer, shape, steel, street, surface, system, texture, town, transport, underground, urban, utility, walk, walkway, waste, water, watercourse, way,