From the Sierra Club TCOF site (see link below): 
"The Sierra Club Sustainable Consumption Committee Mission: To encourage
people to think about the environmental impacts of their consumption choices by
providing specific information."
The Long Beach Group has a local True Cost of Food Committee championed by Mary
Papavasiliou. This committee is dedicated to educating local residents about
the mission of the True Cost of Food campaign and the benefits that a
sustainable consumption lifestyle has in terms of personal health and
environmental impact.
Our local TCOF committee occasionally organizes luncheons at local restaurants
to promote a vegetarian diet. These events are/will be listed below. See what
events are coming up and consider joining us. Also, check out our TCOF Yahoo Group site and sign up for e-mail notifications
of TCOF activites and news.
Some solutions (from the National TCOF site):
Eat more vegetables, fruit, and grains and less meat.
Look for meat that is produced in the least harmful way-grass fed, organic, antibiotic- and hormone-free.
Buy organic whenever you can.
Buy from small, local sources whenever you can.
MAY 31 SUN TRUE COST OF FOOD VEGAN MEAL. Eat American - Eat Vegan – Quick Service! Eat Sustainably and Enjoy Good Food in Good Company. Join us at The Veggie Grill, University Center, 4213 Campus Drive, Irvine, CA, 343-509-0003. The food is delicious. You will leave with a spring in your step and a comfortable tummy. A great location where you can enjoy a movie or shop before or afterwards. Bring everyone you know. If the weather is warm, we will eat outside. Time: 4:00 pm. Complete Cost: $20 (includes tax, tip, and $2 fundraiser). A check for $5/person absolutely required to reserve – bring $20 cash, we return your check when you show up. Send phone number + check payable to “The Veggie Grill” to: Lina Daukas, 4835 Anaheim St. #315, Long Beach, CA 90804, linadaukas@yahoo.com, 562-494-4402. Hosts: MARY PAPAVASILIOU, LINA DAUKAS E, C
The Sierra Club's National True Cost of Food web site has multiple links and lots of information.
Find LA County Farmers Markets...
The farmers markets in Long Beach are hosted by the Harbor Area Farmers Markets organization. Visit their website for locations, times, and other information such as what's in season.
Farmer.net is set up to identify Certified Farmer's Markets in Southern California.
One of my favorite sites, Experience LA, has a listing of local area farmer's markets. If you visit this site, spend some time seeing what other information is available, such as it's metro adventures section.
Find Orange County Farmer's Markets...
Orange County.net lists lots of things to do in OC, including a listing of their farmer's markets.
Local sources for organic food...
Beyond the farmer's markets listed above, check out Long Beach Organic's site for information on local, organic, community gardens and organic gardening workshops.