With cities in India and Pakistan ranking among the world's most polluted, new technologies must be adopted to tackle dangerous levels of winter smog ... there are other sources of pollution ...

THE looming threat of smog has cast a long shadow over Punjab for the last about six years, particularly during winter months ... is monitoring pollution sources, analyzing data, and engaging ...

Apartment blocks loom out of the smog in Belgrade. Source: Tatyana Kekic. Belgrade’s air pollution ranks so high in the winter months that it often sits alongside cities like New Delhi and Lahore.