Ключевые слова: air pump, blue, chimney, clear, climate, condensation, dust, dusting, environment, exhaust pipe, factory, fog, fuel and power generation, fumes, furnace, gas, global warming, healthcare and medicine, healthy lifestyle, industry, inhaling, life, manufacturing, midair, monoxide, natural gas, ozone layer, pipe, pollution, power, power supply, problems, progress, scene, sky, smog, smoke, smoking, stack, steam, stratosphere, technology, tower, toxic substance, transparent, urban, vapor trail,