http://blogs.mercola.com/sites/vitalvotes/archive/2008/08/27/Eating-Local-Could-Slash-US-Energy-Use.aspxThe amount of energy used to produce food in the U.S. could be cut in half if Americans ate less and ate local foods, in addition to eating less meat, dairy and junk food, and using more traditional farming methods. About 19 percent of the total fossilenCommunityServer 2008.5 SP1 (Build: 31106.3070)http://blogs.mercola.com/sites/vitalvotes/archive/2008/08/27/Eating-Local-Could-Slash-US-Energy-Use.aspx#128708Tue, 26 Aug 2008 21:38:42 GMT24451277-a5aa-4add-96dc-64081bfd86fa:128708shaneperroneI am not sure how many calories of energy it takes to create food in a hydro/aeroponic system, but the systems are easy to build once you know how. You can have hundreds of tomato plants in a limited space and even in the winter too. There are grow lights that are 15w high power led bulbs that screw into normal light sockets and cover 5 square feet of space. If you happen to need to cover more i believe there are ones that even cover 70 square feet and they are on par with those HID lights at around 400w. That is if memory serves me right on the latter of the lights.<br /><img src="http://blogs.mercola.com/aggbug.aspx?PostID=128708" width="1" height="1">