According to scientists, smoking is the most common cause of emphysema and accounts for 85-90% of cases.

In addition to this factor, the human body will get emphysema if it regularly inhales other contaminants such as smog, air pollution, chemical fumes, wood smoke, or other gases and vapors.

In some cases, smokers are also more likely to develop emphysema if a loved one has ever had COPD or is hereditary.