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The Sahel forms a belt up to 1,000 km wide, spanning Africa from the Atlantic Ocean to the Red Sea Main article: History of West Africa The Sahelian kingdoms were a series of centralized kingdoms or empires that were centered on the Sahel , the area of grasslands south of the Sahara , from the 8th century to the 19th.
The Sahel has a high to very high sunshine duration year-round, between 2,400 hours (about 55% of the daylight hours) and 3,600 hours (more than 80% of the daylight hours). The sunshine duration in the Sahel approaches desert levels, and is comparable to that in the Arabian Desert, for example, even though the Sahel is only a steppe and not a ...
The Sahel region (brown), proposed Great Green Wall (green), and participating countries (white) Satellite photo of the Sahara The Great Green Wall or Great Green Wall for the Sahara and the Sahel (French: Grande Muraille Verte pour le Sahara et le Sahel; Arabic: السور الأخضر العظيم, romanized: as-Sūr al-ʾAkhḍar al-ʿAẓīm) is a project adopted by the African Union in ...
Quizlet, which was founded in 2005, now has over 60 million monthly active users across 130 countries. The company raised a $30 million Series C in May 2020, bringing the company's post-money ...
Also in 2016, Quizlet launched "Quizlet Live", a real-time online matching game where teams compete to answer all 12 questions correctly without an incorrect answer along the way. [15] In 2017, Quizlet created a premium offering called "Quizlet Go" (later renamed "Quizlet Plus"), with additional features available for paid subscribers.
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The Sahel Region — a political region of Burkina Faso, located within the international cultural−biogeographic Sahel region of Africa. For the African geographic region, see Category: Sahel . Subcategories
Based on Senegal river cycles, precipitation cycles of various El Sahel stations which are related to Solar (89–120 years) Wolf-Gleissberg cycles, and on relations to Nile floods and Equatorial lake levels, Yousef and Ghilly in 2000 anticipated that there is a considerable probability that drought will occur El Sahel Zone in 2005±4 years.