Ключевые слова: aquatic, below, biological, biology, blue, chemical, contamination, danger, dangerous, deep, dirty, disposal, diving, down, drain, ecological, ecology, environmental, exploration, exploring, garbage, immersion, industrial, lagoon, marine, material, nature, ocean, outdoor, pipe, pipes, planet, polluted, pollution, problem, recycling, scientist, scuba, sea, seawater, sewer, sewerage, snorkeling, toxic, undersea, underwater, waste, wastewater, water,