An oil crunch will upend our food system, not just our transportation

The end of cheap oil is the topic du jour in environmental circles these days. Blogs devoted to peak oil are popping up like fungi; even mainstream outlets like CNN are devoting air time to it. But discussion seems to focus entirely on how we’ll power our houses and cars; organic farmer and food writer Tom Philpott says it’s high time enviros thought more about how we’re going to feed ourselves once fossil-fuel prices soar sky high.