PM2.5 is particulate matter smaller than 2.5 micrometers, which contains various harmful substances such as soot, rubber, sand, asphalt, heavy metals, bacteria and gases. They can penetrate deep into the lung tissue and cause inflammation and mutations.
The authors of the new scientific study analyzed data from several studies. They found that living in an area with high PM2.5 levels for three years increased the risk of developing lung cancer by 40-73%. In this case, the disease is usually associated with a mutation in the EGFR gene.
Source: Ferra

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