"Stamp out corruption in our society": that's the message from South African trade unions and civil society groups as they take to the streets, calling on President Jacob Zuma to clean up the government. Also, frequent electricity blackouts are a major issue on the continent. In Nigeria, companies are waking up to the idea that there's money to be made by solving the problem using solar energy. And archaeologists in Egypt call for a re-think about the burial chamber of King Tutankhamun.

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