Malthus, a Meal a Day is an interesting idea by Conceptual Devices. It shows us how we can learn to stop worrying about the food and love the (population) bomb.
Malthus is an in-home aquaponics unit designed for the next generation kitchen or living room. It grows one meal a day: a portion of fish and a side salad. Aquaponics farming is a technique that combines the cultivation of fish with the growing of vegetables. The fish provides rich fertilizer for the plants and in return, the plants clean the water from the tank. The fish and the plants co-exist in a symbiotic relationship.