An Amazon review says that What the World Eats is a kid version of Hungry Planet. It also says the books are very, very similar, but Hungry Planet is geared for an older crowd. This may not be accurate, but it's one reviewer's take on the two books.
Mom to dd14 (y9), dd12 (y7), dd 10 (y4), dd8 (y2/3), ds6 (y0/1), ds4 & dd4. Learning to homeschool with busy twins ...loving AO!