Dry areas in the Arab world.. the Sinai desert and central Sudan, Libya and North, South and Central Tunisia Algeria and southern Morocco

** Includes dry areas most of the Arab world with less rainfall than 150 mm per year. 

** Includes northern Egypt, including the Sinai Desert and the northern and central Sudan, Libya and Tunisia, and South and South-central Algeria, Morocco and Mauritania, and most parts of the desert in western Iraq and the Levant and the Golan Heights Hijaz and Najd and eastern Saudi Arabia.