A home made charcoal making system in Stone Town, Zanzibar. When a tree is felled to make charcoal it is chopped up and set light to then buried under soil and palm leaves and left to smoulder for several days. The wood burns at high temperatures which pyrolyzes the wood. The making and use of charcoal contributes to deforestation and air pollution. It is an affordable fuel used for cooking across Africa. (photo by Andrew Aitchison / In pictures via Getty Images)
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