Ключевые слова: air, air monitoring, air quality, atmosphere, auto, automobile, background, car, carbon footprint, city, climate change, danger, dioxide, dirty, disaster, ecology, emission, emission regulations, engine, environment, environmental, environmental policies, environmental sustainability, exhaust, fog, fumes, gas, global warming, health, highway, industry, muffler, nature, ozone, pipe, pollution, power, respiratory health, road, smog, smoke, steam, sustainable, traffic, transport, transportation, urban environment, vehicle, waste incineration,