The problem as I've heard it isn't about how much food is available or can be produced on the planet so much as it is corrupt government systems and human greed which prevent the food (of which plenty can be made available) to those who need it rather than to the favor of those who want to get or remain rich. That's one of the reasons I've never put any stock in "zero population growth" types of suggested solutions for the world's problems. Less starving people on a planet with less people period but nothing else has changed is still too many starving people. Meanwhile since I can't change the world I'll still just do what I can to help others and keep eating healthy low carb.