Ключевые слова: bag, bin, bottle, care, city, clean, clear, collect, concept, dirt, dirty, ecology, environment, environmental, fall, floor, garbage, ground, hand, junk, keep, nature, outdoor, paper, people, person, picking, plastic, pollution, protection, recycle, recycling, reduce, refuse, reuse, road, roadside, rubbish, street, trash, used, volunteer, waste, water,