Ключевые слова: channel, collector, concrete, danger, dark, decay, deep, dirt, dirty, drain, drainage, draining, ecology, environment, factory, flooded, flow, flowing, industrial, inside, interior, leak, leakage, mud, mystery, outflow, passage, pipe, pipeline, poison, pollution, river, round, sewage, sewer, sewerage, sludge, stink, stream, subterranean, toxic, tube, tunnel, underground, voronezh, waste, wastewater, water,