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Uganda, the first African country to have more mobiles than fixed telephones, is cited as an example of cultural and economic transformation. Penetration has risen from 0.2% in 1995 to 23% in 2008, with operators making huge investments in infrastructure, particularly in rural areas. Given their low incomes, only about a quarter of Ugandans have a mobile subscription, but street vendors offer mobile access on a per-call basis. They also invite those without access to electricity to charge their phones using car batteries.Popular mobile services include money transfers, allowing people without bank accounts to send money by text message. Many farmers use mobiles to trade and check market prices.

The jury system may not survive if it is undermined by social networking sites

"We cannot stop people tweeting, but if jurors look at such material, the risks to the fairness of the trial will be very serious, and ultimately the openness of the trial process on which we all rely, would be damaged."

Energy and the English Industrial Revolution, which is launched this week, suggests that the era not only stimulated unprecedented progress and growth, but opened a "Pandora's Box" of hazards. While new wealth was created and entire populations lifted out of poverty, the nature of economies also changed dramatically - from forms that were naturally self-limiting, to models which involve plundering finite natural resources without heeding the attendant dangers.