The (possible) downside of Bio-fuels

[Kickoutthejams23]

A scientist friend of mine works on Bio-fuels. (kind of a super ethanol) She and others are convinced that they will replace most gasoline in first world countries over the next 20 years. Here is the tin hat/scary part. Bio-fuels consume a lot of water and land and compete directly with food production. Companies estimate that most of the excess material needed for production will come from Africa which currently underutilizes it's farming potential. This will direct African food production and water use towards energy for first world nations (which is where the money is). US food prices will rise and farming communities that now seem economically backwards will start looking like boom towns. (This is already happening in parts of the midwest) First world nations will not export food that can be converted into energy (read cash) And African food resources will also be directed towards export. (which will make a small minority of Africans very rich) This is estimated to reduce the calories produced for African consumption by 40% of 2000 levels.

She says this in a very matter of fact manner. My question is what happens to Africans in 2020 if the calories available are 60% of 2000 levels