Karachi and Lahore have both had the dubious distinction of ranking among the world's most polluted cities once again. Lahore, with an Air Quality Index of 234, stood second only to New Delhi, while Karachi's 182 placed it firmly in the "unhealthy" category. For citizens of both cities, this is a daily battle to breathe.

Air pollution has evolved into one of Pakistan's gravest public health emergencies. WHO estimates that over 256,000 lives are........

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