http://www.iimahd.ernet.in/publications/data/2010-04-03Charyulu.pdf
"The DEA efficiency analysis conducted on different crops indicated that the efficiency levels are lower in organic farming when compared to conventional farming, relative to their production frontiers."
Organic does not mean local! Less than 30% of organic foods in Vermont co-ops comes from regional sources, at the height of the local growing season. If you want to support local farms(at least around here) you should be buying conventional foods.
http://vtdigger.org/2009/12/02/your-organic-food-made-in-china-part-2/
Here are some suggestions for a 12 year old:
To be is to program.