Food security has become an issue of serious concern because global food supplies are threatened by systemic collapse. Increasing demand for food caused by global population growth, changing lifestyles in developing countries, climate change and competition with biofuels are combining to create a ‘perfect storm’ (Godfray et al, 2010). Moreover, short-term weather pattern changes leading to floods and droughts and associated fires in key grain-producing areas of the world encourage speculation in agricultural commodities and cause wild price fluctuations. Drastic price...