Measurement of Atmospheric Concentrations of CO, SO , NO and NOx in Urban Areas of Karachi City, Pakistan: Inorganic Ion Concentrations in Urban Karachi Atmosphere. Biological Sciences - PJSIR, [S. l.], v. 53, n. 1, p. 25–29, 2010. Disponível em: https://biostaging.pjsir.org/index.php/biological-sciences/article/view/415. Acesso em: 22 mar. 2026.