Ключевые слова: background, bad, brent, dirty, discharge, ecology, effluent, environment, environmental, factory, flow, garbage, green, industrial, industry, liquid, nature, oil, pipe, plant, pollution, pollutions, polution, production, recycling, removal, river, sanitation, sedimentation, sewage, sludge, smell, smelly, stream, system, technology, toxic, treatment, waste, wastewater, water, white,