Guardian: With the world population growing at a rate of around 80 million people a year, it is estimated that by 2030 the world will need 30% more water, 40% more energy and 50% more food. That's not just to feed, water and power the new arrivals, but also those currently living "off grid" in developing countries as they rise out of poverty.
In the past, water, food and energy have too often been dealt with as separate issues. Biofuels are a classic example. Once the great hope for sustainable energy,...