Ключевые слова: abstract, backdrop, background, backgrounds, bubble, bubbles, canal, color, damage, danger, dirty, effluent, environment, environmental, floating, flowing, fluid, foam, green, industrial, lake, liquid, messy, natural, nature, pattern, plant, pollution, pond, pouring, problems, river, scum, sewage, slime, soap, stagnant, standing, stream, substance, surface, swamp, texture, toxic, treatment, unhygienic, waste, water, wet, white,