by Lisa Reinisch

Farmers in the United Arab Emirates (UAE) are going organic thanks to generous government handouts, air-conditioned glasshouses and the miraculous properties of chicken manure. But tough questions remain about the economic and environmental feasibility of agriculture in an arid country troubled by water shortages, polluted ground water and the global food crisis

Pakistan’s government has no interest in providing clean water to the 700,000 residents of Karachi’s biggest slum. Step forward a 26-year-old British woman with a tablet she says could purify water that kills 20,000 children a year. In the third part of her series on water, Annabel Symington reports