Some did try to convince America that their local rivals were allied to al-Qaeda, in the hope that the Americans would bomb them, but they were lying.Why, if extremism has so weak a grip on Africa, have so many of al-Qaeda's atrocities and attempted atrocities taken place on sub-Saharan soil?
Obama, who once hailed the "blood of Africa within me", has spent only 20 hours on sub-Saharan African soil since becoming president (it was a stopover in Ghana in between summits elsewhere).
In the case of our simulation the only parameter that affects the surface albedo of the perturbed east Saharan area is the soil colour, which is determined by the value of the soil colour index of the area.
In the Saharan region in the north the soil is infertile, except in a few oases where water is found.
In our case, the microbial content of Saharan dust could have been mixed with soil particles from land surfaces of northern Africa and Crete along the advection of southerly air masses to the sampling site.
Malawi's soil, like that across sub-Saharan Africa, is gravely depleted, and many, if not most, of its farmers are too poor to afford fertilizer at market prices.
The U.S. Department of State adds that the HIV/AIDS epidemic has generated a large number of orphans and child-headed households, especially in sub-Saharan Africa, a situation that creates fertile soil for trafficking and servitude.
Farmers in sub-Saharan Africa lack good quality seeds, and the soil they till is often degraded from overuse or lack of irrigation.
Following last year's clampdown on migrants trying to make it overland to the Spanish enclaves of Ceuta and Melilla in Morocco, or across the Strait of Gibraltar, large numbers of boats have been heading instead for the Canary Islands - the nearest piece of European soil to the coast of sub-Saharan Africa.
Private foundations, companies, and academic institutions have pledged another $400 million, including $100 million from the Bill & Melinda Gates Foundation to study the effects of the microbiome on malnutrition and ways to manipulate soil microbes to improve crops in sub-Saharan Africa.
