They say in 100 years much of the real estate in San Francisco that is currently dedicated to automobiles will be dedicated to growing food, as part of the local/sustainable/natural food movement that has gained so much traction.
I'm in my 2nd year of growing food on a small 8 x 10 plot of land out at Candlestick State Recreation Area. Last year we took out 60 lbs of tomatoes from three plants. We saved hundreds of dollars on fresh herbs over the course of the growing season. We had fresh vegetables coming in all summer and well into the fall. It is amazing how much food you can grow on such a small plot of land.
Here's a photo of this year's garden, which we finished planting a few days ago. This year we'll be growing 3 kinds of corn, 3 kinds of tomatoes, broccoli, peppers, carrots, peas, thyme, sage, 2 kinds of basil, 2 kinds of chives, 3 kinds of oregano, parsley, mint and cucumbers. Is the garden going to be crowded? You bet.... but that's life in the big city. Gotta get used to crowded conditions.
Later in the summer I'll post a pic of the garden when it's in full gear. Should be fun to compare the early garden vs the late production version.