Ключевые слова: air, atmosphere, carbon, carbon emissions, chemical, chimney, city, climate, climate change, cloud, co2, coal, concept, contamination, damage, danger, dioxide, dirty, ecological, ecology, emission, emissions, energy, environment, environmental, exhaust, factory, fumes, gas, global, global warming, industrial, industry, manufacturing, pipe, plant, pollution, power, production, sky, smog, smoke, smokestack, technology, tower, toxic, vehicle, warming, waste,