Ключевые слова: bad ecology, bubbles, contaminant, contamination, defilement, dirt, dirty foam, dirty scum, dirty water, dirtying, discharge sewage, ecology, environmental issue, eutrophication, foam, foaming, form cone, froth, gentle, gentle foam, head, hpv, impurity, lather, light, organic matter, organics, pollutant, polluter, scum, sewage, soap, soft, soft water, soiling, spring creek, spume, stream, suds, water pollution, weightless,