ISLAMABAD -- Businessman Javed Ahmed is taking no chances with his family as Pakistan's business and banking hub Lahore shuts down over toxic smog that marked it as the world's most polluted city.
Environment
Pakistan gripped by health emergency over 'unbearable' smog
Business hub Lahore shuts down after air quality called worst in the world
Smog descends on Multan, Pakistan, a city in eastern Punjab province badly affected by deteriorating air quality nationwide. © Reuters
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