Ключевые слова: advertisement, air, alphabet, atmosphere, backdrop, background, ban, business, certified, cfc, chemical, chlorofluorocarbon, compound, concept, copy, dangerous, depletion, design, earth, element, environment, equipment, free, gas, global, grass, green, guarantee, harmful, hazard, health, hydrocarbon, industry, label, letter, material, montreal, ozone, planet, pollution, production, protocol, qualified, safety, science, space, spray, volatile, warming, word,