One of the commenters on the article points out that we already produce enough food to feed more than nine billion people, so the reason people go hungry isn't because there isn't enough food it's because the food isn't in the right places.  The infrastructure in places like the U.S. can handle food distribution for a much larger population, but in third world countries there is obviously a problem even with the current population.  So what we really should be thinking about is how to get the food to the people who need it, not how to produce more food.