The term "urban air quality" refers to the overall cleanliness and purity of the air in urban areas. It takes into account factors such as pollution levels, particulate matter, nitrogen oxides, sulfur dioxide, carbon monoxide, and other contaminants that can have a negative impact on human health and the environment. The quality of urban air is often influenced by various sources including transportation, industry, power generation, and residential activities. Monitoring and improving urban air quality is an important aspect of sustainable city planning and public health initiatives.