Regularly headlines reach us about how eight out of 10 children don't know where bacon comes from or that they believe cheese grows on trees. 

Daft though these are, apparently the source of food isn't as simple as we might think. An international team of scientists have found that 98% of the world's population is produced in 23 food-producing regions.  There isn't a single country's diet that consists wholly of native food crops and there are some surprises. Thailand's chillis and Italy's tomatoes both originate from South America - that puts a slightly different marketing spin on Italian sauce in jars!