Internet revolution to sweep Africa. The internet is on the point of revolutionising the economy in many African countries. According to a survey carried out by McKinsey consultants, the internet could effectively contribute up to $300 billion to Africa's annual GDP from now until 2025, despite the fact that this contribution currently stands at just $18 billion a year. Internet could also help to improve productivity to the tune of $300 billion in certain key sectors. These figures...