Bottle wall: empty plastic bottles stuffed with plastic bags, sandwiched between chicken wire and them cemented in concrete. The ultimate in recycling & making something from almost nothing. A peace corp worker came up with this idea to build a school.
Danish company HUMAN HABITAT has developed a hydroponic garden system that requires just 538 square feet of space to grow fresh food. It is called IMPACT FARM and could be the beginning of a commercial farming revolution.