Why are particulates considered harmful to human health?

Particulates are tiny solid particles or liquid droplets suspended in air, and they represent a significant health risk primarily because of their ability to enter the respiratory system. When inhaled, these particulates can penetrate deep into the lungs and even reach the bloodstream. This can lead to various respiratory diseases, such as asthma, chronic obstructive pulmonary disease (COPD), and other serious health issues, including lung cancer. The depth of penetration into lung tissue and their potential to provoke inflammatory responses is what makes them particularly dangerous. Therefore, their ability to cause respiratory problems is a critical reason why they are considered harmful to human health.