Kabul residents, this winter, face deadly threat: Air pollution.
For weeks a thick layer of toxic smog has blanketed the sprawling city of Kabul as cold air traps pollution caused by people burning coal, wood, car tyres and even garbage to stay warm.
The choking contamination peaks in evenings and early mornings when temperatures plunge below zero.
Dangerous particulate matter, including toxins like sulphate and black carbon, hang in the air like a thick curtain, reducing visibility and making breathing difficult.
Residents complain the air is getting worse, a view supported by doctors who report a sharp rise in respiratory illnesses.