The American Public Media program, Marketplace, has been doing a series called Food Fight. I've not caught all of the installments, but those I have heard have usually been informative and interesting. You might want to check out the series. This also has use for those who teach current events and world studies, as it offers a number of international perspectives.
You and your students can listen on-line, download for MP3 or read the transcripts. I hope this is helpful.