WHO warns of the serious consequences that a very high concentration of nitrogen dioxide has for our health. Children, the elderly, and people with health problems (such as asthma, heart and lung diseases) would be the most affected.
For human health, its effects mainly include airway inflammation, organ disorders, such as liver or spleen, or systems, such as the circulatory or immune system, which in turn cause pulmonary infections and respiratory insufficiencies.
On the other hand, nitrogen dioxide also provokes the formation of particulate dust, especially fine PM2.5 particles, which are the most harmful. In reaction with sunlight, UV is also a precursor of ozone formation in reaction to volatile organic compounds such as formaldehyde, which potentially worsens the aforementioned consequences on health.