Burkina is one of the West Africa's over populated country. The capital city of Burkina is Ouagadougou. Much of the area of Burkina is dominated in the arid Sahel region and is threatened by the slow invading Sahara that expands towards South. For millions of people in this area life is a perpetual struggle against a hostile climate, political instability and the threat of drought. Burkina's main export is gold and has deposits of silver and manganese ore. Lack of work has forced many young people to leave to abroad countries in search of work. The main languages are French, Mande, Mossi, Fulani, Lobi and Bobo. The authorized currency is CFA Franc.