Abantu bakhiqize amathani epulasitiki angu-8.3 billion.Ngo-2050, kuzoba namathani ayizigidi eziyizinkulungwane eziyi-12 emhlabeni jikelele.Ngokocwaningo lweJournal Progress in Science, kusukela ekuqaleni kwawo-1950, amathani ayizigidi eziyizinkulungwane ezingu-8.3 epulasitiki akhiqizwa abantu, iningi lawo asephenduke imfucuza, ...
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