urban air pollution

Urban air pollution refers to the presence of harmful substances in the air within cities, primarily from transportation, industrial activities, and energy production. Common pollutants include particulate matter (tiny particles that can reach the lungs), nitrogen oxides, sulfur dioxide, carbon monoxide, and ground-level ozone. These pollutants can cause health problems such as respiratory issues, heart disease, and aggravate existing conditions. Urban air quality varies depending on weather, traffic, and regulations, but overall, pollution levels tend to be higher in cities than in rural areas, impacting both health and the environment.