Reuters: Rising land degradation reduces crop yields and may threaten food security of about a quarter of the world’ population, the United Nations Food and Agriculture Organisation (FAO) said on Wednesday. Food security has been highlighted in recent months as soaring crop prices resulting from poor harvests, low stocks, high fuel prices and rising demand, risks causing starvation for millions of people in the developing world. “An estimated 1.5 billion people, or a quarter of the …