Ключевые слова: air, atmosphere, carbon dioxide, carbon emissions, carbon footprint, chemical, chimney, city, climate, contamination, damage, dirty, earth day, ecology, emission, emissions, energy, environment, environment day, environmental, factory, fumes, future, futuristic, gas, global, industrial, industry, landscape, pipe, plant, pollution, pollution city, pollution industry, production, sky, smog, smoke, steam, technology, toxic, urban, warming,