7. Peshawar, Pakistan This Pakistani city is the second most polluted in the country at 219 ug/m3, beating the capital Lahore which can be found in eleventh place. Reports from 2006 showed the city at sixth place and “getting worse”, despite the government taking anti-pollution measures. Clearly the measures were ineffective, given how polluted the air still is. Part of the problem is the auto-rickshaws that clog up the streets and belch out fumes.