A new report on global hunger pinpoints factors at the heart of spikes in food prices it says are exacerbating the unfolding food crisis in the Horn of Africa. The Global Hunger Index (GHI) points to climate change, growing demand for biofuels, and increasing commodities futures trading in global food markets as the causes of price increases in food, which it says were also at the root of the food crisis of 2007-2008.