Pakistan's Lahore remained the world's most polluted city, while visibility in parts of northern India fell to zero. Seasonal crop burning, low winds, and dropping temperatures contribute to toxic smog in these regions.

Pakistan, India and other countries in South Asia are shrouded in a layer of smog that is so thick, it's visible from space. Satellite imagery from NASA Worldview shows most of northern and eastern Pakistan and parts of western India covered in a blanket ...

The government in Lahore has closed schools and public spaces and shut down factories. Environmental lawyer Ahmad Rafay Alam shares his perspective: "frustrated" but still fighting.

The satellite images show an extremely heavy grey smog over Pakistan. It stretches into northern parts of India, albeit is lighter than the one over its neighbouring country.

Pakistan’s cities slip under toxic smog as live readings for Lahore show PM2.5 levels 100 times over what WHO prescribes