Ключевые слова: background, bin, blue, bottle, box, can, clean, collection, colorful, concept, conservation, container, dirty, discard, disposal, dustbin, eco, ecology, environment, environmental, garbage, green, junk, litter, management, metal, nature, object, outdoor, paper, park, plastic, pollution, protect, recycle, red, reduce, refuse, reuse, rubbish, separation, sign, symbol, throw, trash, urban, waste, white, yellow,