Wastewater drains down drainage pipe. Pollution of water resources.

nature, wet, outdoor, environment, liquid, water, danger, technology, flowing, stream, construction, industry, ecology, biological, toxic, tube, foam, environmental, recycling, dirty, chemical, waste, problem, Pollution, unhygienic, garbage, bad, fluid, pipe, sanitary, smell, canal, disaster, drain, contamination, mud, waterfall, processing, scum, sewer, infection, sewage, wastewater, conduit, drainage, sewerage, turbidity, filtering, Water Pollution, Sewage Treatment Plant,