How to assess the impact of smog on personal health?

In our daily life, poor manners are easy to make people cough and sneeze, which directly affects our study and work, especially office workers, and even affects our night sleep, which is prone to snoring and sleep apnea. Long-term exposure to high concentrations of PM2.5 will increase the risk of liver cancer by about 2%. Mainly because PM2.5 enters the pulmonary blood vessels, causing chemical reactions, which will also lead to liver inflammation, thus forming cirrhosis and liver cancer.