African peoples, who account for over 12% of the world's population, are distributed among 55 nations and are further distinguishable in terms of linguistic and cultural groups, which number around 1,000. The Sahara forms a great ethnic divide. North of it, mostly Arabs predominate along the coast and Berbers (including the Tuareg) and Tibbu in the interior regions. Sub-Saharan Africa is occupied by a diverse variety of peoples including, among others, the Amhara, Mossi, Fulani, Yoruba, Igbo, Kongo, Zulu, Akan, Ewe, Oromo, Masai, and Hausa. Europeans are concentrated in areas with subtropical climates or tropical climates modified by altitude; in the south are persons of Dutch and British descent, and in the northwest are persons of French, Italian, and Spanish descent.