At time of writing, more than half of mankind, some 3.3 billion people, are living in urban areas. By 2030, this is expected to swell to almost 5 billion. We are simultaneously experiencing a global food crisis resulting from low productivity, government policies diverting food crops to the creation of biofuels, climate change and growing food demand brought on by an exponentially expanding population. The world is heading for a drop in agricultural production of 20 to 40 per cent, depending on the severity and length of the current global droughts.
展开▼
