The largest cities in the Hindu Kush Himalaya region number in the millions of inhabitants. The most populous cities include Khabul (Afghanistan), Kathmandu (Nepal), Srinagar (India), Peshawar (Pakistan), Quetta (Pakistan), Xinning (China), and Dehra Dun (India). Large cities such as Kathmandu, Lhasa or Dehra Dun are growing at rates that double the population of these…