It's sad, but here in CA, most people don't have yards and there's nowhere to grow food. It's especially dumb because there's miles and miles of undeveloped land everywhere (at least in the east bay suberbs), not being used for anything in particular except maybe some farms with cows on it: I'm sure they're taking advantage of huge tax wholes because they're sitting on land that would cost 10s of millions of dollars in property taxes were it taxed at the same rate that people need to pay.
Also, there's no community compost which means people need to buy all of it at stores like home depot, making it expensive because they have to bag it and warehouse it, etc. The nearest compost I have to my house where I can get compost is nearly 35 miles away.