KARACHI: With pollution in Pakistan hitting record highs in recent years, citizens clutching air monitors and legal papers are taking the fight for clean air into their own hands. 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.