Something about teaching a man to fish? What you want is for the money to fill a longterm need, not disappear in a few years. You also don't want to buy food wholesale when growing it is cheaper. I personally like the idea of Cuba's urban farming initiative. If i owned a home i would tear up the lawn and grow a garden. It's a good financial investment as well. Herbs like basil are expensive in a supermarket, and chicken in a grocery store is actually cheaper than many vegetables.
If you wanted to end world hunger, water is the biggest issue. Fresh water = food. Take a look at how big Africa is. They already have plenty of land and sunlight.
I was completely ignorant of this until a short while ago. The roll down maps you saw on the chalk board in grade school are a complete lie. Alaska for one is a lot smaller than the map suggests.
