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Every poor country wants, naturally enough, to get richer but wealth can create a whole new set a problems. As diets and lifestyles change people in developing countries are now getting the diseases associated with affluence - heart disease, cancer, diabetes and stress related diseases. Justin Rowlatt interviews the the former prime minister of Pakistan about how developing countries should respond. We learn about a new concept in business, "prosumption" - is it anything more than an idea dreamt up in a think tank brainstorm? And, how can the internet be made more accurate.