Ключевые слова: bright, clean, clear, concrete, construction, corrosion, danger, dirty, drain, drops, dump, environment, flow, flowing, fluid, garbage, industry, liquid, motion, mud, nature, pipe, piping, plant, pollution, resources, river, rust, rusty, sewage, sewer, sheet, splashes, strasbourg france, stream, toxic, tube, tubing, waste, water, water waste,