The Kingdom of Bhutan — with 46,500 square kilometers area, is situated between China and India. It is located in the Eastern Himalayas entirely within one of the world's ten global biodiversity 'hot spots'. Bhutan’s population was estimated to be 920,000 in 2007, with 79% of the population living in rural areas. Bhutan has a population growth rate of 3.1% what is one of the highest in the world. The urban centre of Thimphu (the capital), the southern border (with India) towns of Phuentsholing (economically important city) and Samdrup Jongkhar are the key cities which have the highest population density. The rest of the population lives in the towns that are the headquarters of the Dzongkhag (district) administrations like Paro, Haa, Wangdue Phodrang, Gelephu, etc. The rest are in the remote isolated hamlets/villages, some of which contain as few as 4-5 households.