 The study evaluated air pollution levels in two districts in Lima, Peru. It found that concentrations of particulate matter, PM10 and PM2.5, exceeded international and national standards. The study also identified sources of air pollution in both districts, including vehicular traffic, resuspendant soil dust, industrial activities, and marine aerosols. This article was authored by Gina Mishel-Ilazar-Gonzalez, Lord Joe Gilberto Valdiviezo, Jojen Poole Rojas-Quinchot, and others.