What is the primary health concern associated with oxides of nitrogen?

Oxides of nitrogen, particularly nitrogen dioxide (NO2), significantly contribute to respiratory problems. When inhaled, these gases can irritate the airways, leading to conditions such as asthma, bronchitis, and other chronic respiratory diseases. They can also reduce lung function and increase susceptibility to respiratory infections. This is especially concerning for vulnerable populations, including children, the elderly, and individuals with pre-existing respiratory conditions. The risks associated with exposure to these gases underscore their role as air pollutants that can adversely affect overall respiratory health.