How does tobacco use affect respiratory health?

Tobacco use has a profound negative impact on respiratory health, primarily by leading to decreased lung capacity and various respiratory diseases. When tobacco smoke is inhaled, it introduces numerous harmful chemicals that cause inflammation and damage to the lung tissues. Over time, this damage can result in chronic obstructive pulmonary disease (COPD), emphysema, and chronic bronchitis, all of which significantly reduce lung capacity and function.

The toxic substances in tobacco smoke impair the cilia in the respiratory tract, which are responsible for clearing mucus and pathogens. This dysfunction can lead to increased mucus production and a higher risk of infection, further compromising lung health. Additionally, smoking can cause structural changes in the lungs, which contribute to decreased breathing efficiency and overall respiratory function.

In summary, the correct choice highlights the detrimental effects of tobacco on lung capacity and the increased likelihood of developing serious respiratory conditions, which are well-documented in health research.