When capital city Kabul has grown from 500000 in 2001 to over 3 million people?

The increase in population in Kabul since 2001 is largely attributed to rural-to-urban migration caused by conflict, instability, and lack of economic opportunities in rural areas. The city also attracts people seeking better access to services such as health care, education, and employment. This rapid population growth has put a strain on infrastructure and services in Kabul.