Eat cheaper – grow your own
Here are some links to groups that can help you grow food off-grid:
Institute for Simplified Hydroponics
Effective Microorganisms New Zealand
Permaculture Association (Britain)
Educational Concerns for Hunger (ECHO)
Biodynamic Agricultural Association
P-Patch Community Gardeners Seattle Tilth
Green Grid Roofs Eco-Roof Systems
ZinCo Living Roofs Watts Garden Club – Mag. article Organic Farming will feed the world