As of now, the air quality in Delhi is quite poor, with an Air Quality Index (AQI) ranging between "Unhealthy for Sensitive Groups" to "Unhealthy." The AQI levels indicate that people with respiratory issues, such as asthma, may experience health effects. The pollution levels are primarily due to vehicle emissions, industrial activity, and seasonal burning of crops. In fact, Delhi experiences some of the worst air quality in the world, especially during the winter months. This poor air quality can affect everyone's health, particularly children and the elderly