Organic farming is not just the way forward for wealthy suburbanites. A new study of studies estimates that if all world agriculture shifted to organic farming techniques the world would produce at the low end 2,641 calories per person per day, and at the high end 4,381. The current world agricultural output, including synthetic factory farming techniques, is estimated at 2,786 calories. Even more interesting is the fact that in developing countries small-scale, organic techniques may produce food more efficiently than synthetic alternatives. [kurzweil ai] [photo by Frankie Roberto]