Nature and EnvironmentAir pollution in PakistanTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoNature and Environment07/19/2019July 19, 2019Environmental experts in Pakistan have called air pollution a public health emergency. In Karachi, smog and frequent heat waves make breathing difficult for its 15 million residents. They're trying in ways large and small, to tackle the problem.https://p.dw.com/p/3MKjWAdvertisement