Poor air quality is a recognized risk factor for respiratory diseases, including asthma. This study examined the impact of urban air quality improvement initiatives—such as emission control policies, green space development, and public transportation promotion—on asthma prevalence among children and adults. Data were collected from 3,000 residents across three cities over a five-year period. Air pollutant levels (PM2.5, NO₂, O₃) were monitored, and respiratory health outcomes were recorded through medical records and population surveys. Results indicated a 25% reduction in asthma prevalence, correlated with decreased PM2.5 and NO₂ levels. The study highlights that environmental interventions can effectively reduce respiratory disease burden and emphasizes the importance of integrating health considerations into urban planning and policy.

Keywords:
Asthma, air quality, urban health, environmental health, public health