Search Results for: Parts of plants used in pharmacy
regions of sand dunes (erg) occupy only about % of the sahara; "stone deserts," consisting of plateaus of denuded rock (hammada) or areas of coarse gravel (reg), cover about % of the region; mountains, oases, and transition zones account for the remainder. sparse vegetation is found in most parts of
of mauritania. salt is still mined, as in the past, at taoudenni, mali, and at bilma, niger, and is transported, as in the days of the great medieval kingdoms of w africa, by camel caravans across the desert. people two thirds of the sahara's estimated million inhabitants (excluding those in the nile...
https://encyclopedia2.thefreedictionary.com/Sahara