$) Sahara geographical region without or with rare plants, Sahara is the definition of vegetarian is not climate ", and lower rainfall less than 250 mm per annum, and therefore have less life as well as in many cases be a warm desert day and cool at night and this is known as Balaqarip in climate.
Sahara word called tropical dry low rainfall, the desert areas are not necessarily empty and free of plant growth.
Found in most desert soil of many natural resources that is always renewed. The desert soil, although less of the presence of plant and animal life, but there are types of animals and plants adapt to the desert climate, and adapt to live.
The scholars differed concerning the definition of what is called Sahara, as some scientists say: "Every area of Aisagt the rain more than 25 cm per year, it is a desert." Some of the scholars is the type of soil and vegetation types as a basis for identifying the region, classification, and other scientists combine all these elements, Vitalegon the name of the desert on a few plants of each region, because of the lack of rain and dry soil.
Extends across most areas of the desert regions with warm climates the vicinity of the Tropic of Cancer north and the Tropic of Capricorn in the south, and is subject to high pressure, where the cold air drops, landing and when heated and absorbs moisture rather than releasing them into the atmosphere. Stretching desert areas in other areas overshadowed by the heights of the seas and oceans, as well as in coastal areas. However, some areas near the poles north and south is considered the other parts of the desert, knowing that the climate here is so freezing cold, Fender or no vegetation.
