Ключевые слова: background, black, blocked, building, city, cleaning, dirty, drain, drainage, fatigue, flood, full, garbage, grate, ground, gutter, hard, hole, iron, leaky, maintenance, manhole, metal, open, outdoor, pavement, pipe, repair, road, rusty, safety, service, sewage, sewer, space, steel, storm, street, suck, tank, toilets, tube, underground, urban, waste, water, worker, working,