Maizhokunggar or Meldro Gungkar is a county east of the main center of Lhasa, Tibet Autonomous Region. It has an area of 5,492 square kilometres (2,120 sq mi) with an average elevation of over 4,000 metres (13,000 ft). Most of the people are ethnic Tibetan and are engaged in agriculture or herding. Mining is a major source of tax revenue, but has created environmental problems.