There is a movement afoot that is sweeping the United States. It's called "Urban Homesteading". People are turning their city lots into tiny little farms. They are growing organic food, and sometimes even animals. Not since the "Victory Gardens" of WWII have so many people been so intent on feeding themselves. What they can grow all depends on what their particular city allows.
Whether an urban homestead is started to grow healthier food with organic gardening, save money and be more self-sufficient, or to reduce the carbon footprint of your family, there is not much of a downside to this way of life.
In bad economic times, people look for ways to be more self-sufficient. There is also the issue of the dangers inherent in eating commercially grown food. Chemicals, contaminants, pollution, genetic engineering -- all these things make taking a bite of food something to dread. Organic gardening is growing in popularity every day.
The Internet is a smorgasbord of sites and videos by urban homesteaders all across the country. They are proving that you don't have to own acreage to be self-sufficient. The amount of your self-sufficiency is entirely up to you. Even apartment dwellers are getting into the act, growing container gardens on their patios or vegetable gardens in their courtyards.