Smog-filled cities in north India and Pakistan will continue to experience dangerous level of air quality over the next several months, a top American atmospheric organisation has said, warning that the cities could turn into dangerously unhealthy "snow globes". "This is just the start to the smog season in northern India and Pakistan, as the monsoon will last for much of the upcoming winter. That means there are plenty of more opportunities for cold, stagnant air to fill with pollution, turning cities into dangerously unhealthy snow globes," National Oceanic and Atmospheric Administration (NOAA) said in a statement yesterday.

This file photo taken on November 6, 2017 shows Pakistani children walking to school in heavy smog in Lahore. The toxic smog that has covered parts of Pakistan for weeks has exposed official torpor against rampant pollution which has killed thousands more people in the fast-growing country than years of militancy. Pic/AFP