Ключевые слова: air, area, beautiful, change, chemical, chimney, clear, concept, contamination, danger, dream, ecological, ecology, energy, environment, factory, fumes, future, global, hand, hanging, human, idyllic, imagination, industrial, industry, manufacture, memories, natural, nature, nostalgia, photo, photograph, pipe, pollution, print, printout, problem, purity, shot, smog, steam, summer, technology, toxic, tree,