Ключевые слова: air pollution, air quality, atmosphere, billows, carbon emissions, carbon footprint, chimney, climate change, clouds, combustion, conservation, contaminant, discharge, eco, ecofriendly awareness, ecological, ecological issue, emissions, energy, environment, environmental, environmental awareness, environmental damage, environmental hazard, environmental impact, environmental threat, factory, fossil fuels, fumes, global warming, haze, health risk, heavy industry, impact, industrial, industry, issues, moody, pollutants, pollution, pollution concept, power plant, sky, smog, smoke, sustainability, symbolizing, toxic, toxic emissions, unsustainable,