Shortening your food chain contributes to your family’s food security. Even if you can’t raise animals for meat and have a garden big enough to provide all your family’s food needs whatever you Can do will be beneficial. The more you “keep it local” by getting as much as you can from local farms and farmer’s markets. the better off you’ll be. As you preserve food with canning, dehydrating, freezing, etc. you will eliminate even more products you have to depend on a supermarket. At any rate, do what you can do now while you find ways to shorten your food supply chain.