Ключевые слова: air, aqua, aquatic, ball, ballon, balloon, bundle, celebration, color, colorful, concept, contamination, dirt, dirty, disaster, ecology, environment, environmental, float, floating, garbage, global, helium, inflatable, junk, latex, litter, nature, no people, nobody, ocean, outdoor, plastic, pollute, pollution, problem, protection, recycle, recycling, red, river, rubber, rubbish, sea, surface, swim, trash, urban, waste, water,