Since the Disaster, the Superskaters have lived in supermarkets, munching their way through expired stock and collecting useful junk to keep their electrical appliances working. But now the last supermarket's almost used up ...
Campbell doesn't understand where food comes from. He thinks it just appears at the supermarket. Choose three foods that you have bought from the supermarket like tomato sauce, jam, and bread. Look at the ingredients. For each kind of food, write down the ingredients and where they might have come from.