Microsoft founder Bill Gates has warned that Africa’s population explosion will overwhelm Europe unless the continent makes it more difficult for migrants to reach its shores. The American billionaire’s comments come as European leaders discuss what to do about the surging number of Africans arriving in Italy each week, with Rome calling for other European Union (EU) nations to open their ports to docking migrants so as to ease pressure on the Mediterranean nation. In an interview with the German Welt am Sonntag newspaper, Gates said massive population growth in Africa will result in “enormous [migratory] pressure” on Europe unless countries increase overseas development aid payments. Praising Germany having achieved its commitment to devote 0.7 per cent of GDP to foreign aid as “phenomenal”,…