Sahara Desert
The Sahara is the world’s largest hot desert and one of the harshest environments on the planet.
At 3.6 million square miles (9.4 million square kilometers), the Sahara, which is Arabic for “The
Great Desert,” engulfs most of North Africa. The Sahara’s northeasterly winds can reach
hurricane level and often give rise to sand storms and dust devils. Half of the Sahara receives less
than an inch of rain per year, and the rest receives up to 4 inches (10 centimeters) per year. The
infrequent rain is usually torrential. The Sahara has only two permanent rivers and a handful of
lakes, but it has substantial underground reservoirs, or aquifers. Its permanent rivers are the Nile
and the Niger. It is thought that the lack of water in Sahara Desert area may cause terrorists and
wars.
The Sahel
The Sahel is the Eco climatic and biogeographic zone of transition in Africa between the Sahara
to the north and the Sudan region to the south. Having a semi-arid climate, it stretches across the
south-central latitudes of Northern Africa between the Atlantic Ocean and the Red Sea. The
Arabic word literally means “shore, coast”, describing the appearance of the vegetation found in
the Sahel. The Sahel is the first instances of domestication of plants for agricultural purposes in
Africa in 5000 BC, when sorghum and African rice began to be cultivated. Around this time, and
in the same region, small Guinea fowl were domesticated. Around 4000 BC the climate of the
Sahara and the Sahel became drier at an exceedingly fast pace. This climate change caused lakes
and rivers to shrink rather significantly and caused increasing desertification. This, in turn,
decreased the amount of land conducive to settlements and caused migrations of farming
communities to the more humid climate of West Africa.
The Horn of Africa
The Horn of Africa is a large extension of land extends from the eastern edge of the continent of
Africa, lying between the Indian Ocean to the east and the Gulf of Aden to the north, jutting for
hundreds of kilometers into the Arabian Sea. The Horn of Africa is primarily distinguished
through a low lying arid plain called the Ethiopian Highlands, which is divided into two sections
by the Rift Valley. The two distinct sections of the Ethiopian Highlands form an area rich in
natural resources. While the habitat and plant environment has changed dramatically from its
original state, the Horn of Africa continues to contain a high level of native plant life. The
mountainous geography does not only provide with good agricultural environment, but also
serves as natural defense, the only country exists from the European colonial is Ethiopia.
The Great Lakes Region
The Great Lakes of Africa are a series of lakes in and around the Great Rift Valley. They include
Lake Victoria, the second largest fresh water lake in the world by area, and Lake Tanganyika, the
world’s second largest freshwater lake by volume and depth. The highlands are relatively cool,
with average temperatures in the mid-60s and abundant rainfall. Forests are dominant in the
lowlands, while grasslands and savannas are most common in the southern and eastern
highlands. Temperatures in the lowlands average a hot mid-90s. In history, the Great Lakes
Region has many powerful, highly centralized, wealthy kingdoms, including Uganda, the home
of slaves. The Great Lakes Regions are abundant of coffee, tea, cotton, tobacco and etc.