That depends on the type of smoke. N0X, or nitric oxide (N0) and nitrogen dioxide (N02), which is a natural component of the Earth’s atmosphere, stays in the atmosphere for only a couple of days. Other pollutants such as N20 (nitrous oxide), and Chlorofluorocarbons (CFCs) can stay for longer. N20 can stay in the atmosphere for about 170 years and CFCs can linger from 20 to 100 years. Smog, the most common type of smoke, can stay in the atmosphere for a couple of days to a couple of months depending on how much is produced.
ncrease activity if you are at risk for heart disease.
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