Air pollution and nitrogen oxides (NO2 and NOx) research focuses on these key traffic-related pollutants that significantly impact urban air quality and public health. Studies demonstrate that nitrogen oxide exposure is linked to respiratory disease, cardiovascular problems, and premature mortality, particularly affecting children and the elderly. The evidence reveals how NOx compounds contribute to smog formation and interact with other pollutants to create complex health hazards. Discover the research documenting nitrogen oxide health impacts and why reducing these emissions is crucial for urban air quality improvement.