Keyhole Gardening

With world hunger and a need for local food production, teaching gardening skills to starving people is a must. I try to envision trying to garden with what I have around me only in the process. In the U.S. we have the luxury of garden centers, nurseries and basic clean running water. Keyhole gardening offers plain smart design. Using a composting basket in the center allows for a constant feeding of nutrients and water to the garden. Grey water can be recycled from household daily use and poured straight into the center creating zero waste of drinking water. With the nutrient dense soil more food can be planted in a smaller space and not waste water and resources. The design seems simple enough that a garden  could easily be constructed by most households and communities. I would like to build one of these myself. This video is one being built in Uganda. This design can be adapted to whatever area you live in. Rocks and boulders may be used instead of brick. Freecycled material may also be an option for those of us in the U.S. for material. It would be great not only to be able to use this to grow our own food, but learn the skills so that we may be able to help others no matter where they live.