Many of us have bought into the food stories spun by the glossy magazines, celebrity chefs and local restaurants. We no longer simply purchase ingredients for recipes. Rather, we source them. Some shoppers want to know the provenance of their produce. They insist on organic and refuse to purchase food that's been transported to our shores from halfway around the world.
Food, these days, has become less about eating and more about ethics and environmental concerns. But a book by journalist Jay Rayner called A Greedy Man in a Hungry World questions these (and many other) beliefs we hold about food. He takes pot shots at farmers' markets, organic produce and the "doctrine of local food".
Underpinning this book is the idea that the sustainability of food production matters far more than fashionable posturing about "modern food culture". It says that "we will soon have nine billion mouths to feed" and "[a]ccording to the United Nations, by 2030 we will need to be producing 50 per cent more food, and a system built around that holy trinity of local, seasonal and organic simply won't cut it".
Food grown locally may have long been prized by foodies but Rayner says that "the committed locavore, who thinks that buying food produced as close by as possible is always the most sustainable option, has been sold a big, fat lie." In fact a 2006 study found that "lamb, apples and dairy produced in New Zealand and shipped to Britain have a smaller carbon footprint than the equivalent products produced in Britain".
Specifically, "Britain uses twice as much energy per tonne of milk solids produced as New Zealand, and four times more than New Zealand for lamb." More than just transport costs must be included in the calculation. The petrochemicals used in fertiliser as well as the energy required to erect farm buildings and to manufacture and run farm machinery also need to be taken into account.