Ключевые слова: beauty, canal, city, cleanup, concrete, contamination, dirty, drain, drainage, drainpipe, ecology, environment, environmental, fall, flood, flow, flowing, forest, fresh, garbage, green, industrial, industry, landscape, liquid, mountain, outdoor, park, pipe, pipeline, pipes, pollution, pouring, river, rock, rust, scenery, scenic, sewage, stream, summer, tourism, toxic, travel, tube, view, waste, wastewater, water,