I started thinking more closely about food – where it comes from, how it’s produced, how I might choose more sustainable foods – after hearing a keynote speech by Prof. Jon Foley at US-IALE 2009. Making the ‘right’ choice can be tricky, however. For example, there’s a difference between ‘natural’ and ‘organic’ and you need to consider a myriad of things if you want to know how much oil there is in your oatmeal. Working out which of the products on the shelves of your supermarket are most sustainable will hopefully be easier in the future if Wal-Mart successfully follows through on its plans to develop a ‘sustainability index’. In the meantime, the new movie Food Inc. may provide some motivation to think more carefully about the food we eat. I haven’t seen it yet but the trailer looks provoking.