Dark matter is a theoretical kind of matter.
Deh Sabz District is situated northeast of Kabul City in Afghanistan .. District. Districts of Afghanistan. Kabul. Kabul. Afghanistan. Afghanistan. It has a population of 100,136 people -LRB- 2002 UNHCR estimate -RRB- .. UNHCR. UNHCR. About 70 % are Pashtuns and 30 % are Tajiks .. Pashtuns. Pashtun people. Tajiks. Tajik people. Deh Sabz borders Shakardara and Mir Bacha Kot districts to the west , Kalakan and Qarabagh districts to the north-west , Parvan Province to the north and east , Surobi to the southeast and Bagrami and Kabul districts to the south .. Province. Provinces of Afghanistan. Kabul. Kabul. Shakardara. Shakardara District. Mir Bacha Kot. Mir Bacha Kot District. Kalakan. Kalakan District. Qarabagh. Qarabagh District, Kabul. Parvan Province. Parvan Province. Surobi. Surobi District ( Kabul ). Bagrami. Bagrami District. The headquarters of Deh Sabz is the village of Tarakhel , situated in the south-western part of the district .. Tarakhel. Tarakhel. headquarters. headquarters. The Kabul River flows through the district in its southern end and the main highway -LRB- Kabul-Jalalabad -RRB- passes along it .. Kabul. Kabul. Kabul River. Kabul River. Jalalabad. Jalalabad. Most of its people live in villages .. Many houses were destroyed during the Soviet war in Afghanistan , and many people were displaced .. Afghanistan. Afghanistan. Soviet war in Afghanistan. Soviet war in Afghanistan. Agriculture is the most important source of income , though droughts are a serious problem .. Education is relatively good , there are some schools for boys and girls .. The district 's health care was expected to improve by 2011 .. In early 2007 , the Afghan Ministry for Rural Rehabilitation and Development -LRB- MRRD -RRB- laid a foundation of a modern residential scheme in Deh Sabz district for a 20,000 houses .. It is part of an extension of Kabul City with Deh Sabz district , expected to be completed in five years .. Kabul. Kabul