Smog, industrial waste and contaminated water are just a few of the environmental problems facing many of the biggest cities today. But there is another type of pollution that’s becoming increasingly prevalent in our cities: noise pollution. Medical experts say people exposed to constant noise can suffer from a variety of psychological and physical ailments. As Saleem Shayan reports, it’s a particularly serious problem in megacities like Karachi in Pakistan where noise is a constant companion.
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