PlanetEarth: Food is not just something we eat. Its fluctuating price and availability mean it will be one of the main ways many of us will interact with the environmental issues of our time: climate change and competition for water, land and energy. Tim Benton explains why.
By the middle of the century, global demand for food is projected to grow by about 60 per cent, as population rises, and the burgeoning global middle class develops more sophisticated tastes and devotes more money to satisfying them. But...