Zero visibility: A truck moving with lights on due to smog enveloping the area of Lahore in this file photo. — AP
Tens of millions of Pakistanis have spent at least four months breathing toxic air pollution 20 times above safe levels in the worst winter smog season for several years, according to data analysed by AFP.
Pakistan regularly ranks among the world’s most polluted countries, with Lahore often the most polluted megacity between November and February.
