With monitors and lawsuits, Pakistanis fight for clean air

More than a decade ago, engineer Abid Omar had a "sneaking suspicion" that what the government described as seasonal fog was actually a new phenomenon. "It wasn't there in my childhood" in Lahore, said the 45-year-old who now lives in coastal Karachi, where the sea breeze no longer saves residents from smog. With no official data available at the time, Omar asked himself: "If the government is not fulfilling its mandate to monitor air pollution, why don't I do that for myself?" His association...