Ключевые слова: air, atmosphere, background, bag, blue, bottle, chemical, chimney, climate, concept, conservation, contamination, damage, danger, dirty, earth, ecological, ecology, energy, environment, environmental, factory, garbage, gas, global, industrial, industry, litter, nature, ocean, pipe, plant, plastic, polluted, pollution, power, problem, rubbish, sea, sky, smog, smoke, steam, technology, toxic, trash, warming, waste, water,