National Environment Protection Authority said that the suspended particles in Kabul air sometimes reach up to five hundred micros, while more than one hundred and fifty micros are considered dangerous. 

The authority said that more than 50% of the roads are not asphalted, and this is one of the main causes of Kabul's air pollution.

In this episode of Mehwar host Jamal Nasir Farahmand discusses the topic with Kazim Hamyoun, air pollution expert.