1) I think that cereal wastes the most raw material because cereal is just so small that people might seem that it is not a big deal to waste it
2) I think sugary drinks because they are so high in sugar yet give no nutrition at all.
3) About 690 million people are lacking the proper food they need. I would like to mention that about 8 billion people are in the world and that the majority of people that are undernourished live in the Central African Republic. Ther reason I think is because of the unstable government and recurring droughts.