Ключевые слова: air, atmosphere, black and white, carbon dioxide, care, caucasian, change, chemical, chimney, climate, concept, control, copy space, danger, dark, dirty, disaster, double, earth, eco, ecology, exhaust, exposure, face, female, fumes, gas, girl, global, hazard, horizontal, industrial, mask, nature, person, pipe, planet, pollution, problem, production, respiratory, save, silhouette, smog, smoke, toxic, trouble, urban, world, young,