Ключевые слова: agriculture, background, bag, bottle, bottles, chemical, clean, cleaner, cleanup, coast, collect, dirt, dirty, dump, ecology, environment, environmental, garbage, gas mask, hand, horror, impure, junk, lake, litter, nature, oil, park, people, plastic, polluted, pollution, pond, problem, recycle, river, rotting, rubbish, sewage, smell, substance, suit, toxic, trash, unhygienic, unpleasant, volunteer, waste, water, work,