Sustainable Civilization: From the Grass Roots Up Chapter I - Your Homestead And Essential Life Support - 2 - 3 - 4 - 5 - 6 AQUAPONICS This is a combination of a fish tank/pond and a garden. The tank water is circulated through the garden, which fertilizes the garden, and cleans the water for collection and pumping back to the fish. (See reports from the "New Alchemy Institute" from back in the 1970's.) ALGAE AEROPONICS CONTAINER GARDENING The earlier textbooks show 1" to 3" of soil held on a grid, over a 1/2" to 3" air space, over water maintained in steady depth of 1" to 3". FORAGING FOOD STORAGE