new, not commercially available components of a waste heat driven refrigerator. A similar scheme (multiphase cooling) can be by a multistage evaporative cooler. The air is passed through a spray of salt solution to dehumidify it, then through a spray of water solution to cool it, then another salt solution to dehumidify it again. The brine has to be regenerated, and that can be done economically with a low-temperature solar still. Multiphase evaporative coolers can lower the air's temperature by 50 °F (28 °C), and still control humidity. If the brine regenerator uses high heat, they also partially sterilise the air. If enough electric power is available, cooling can be provided by conventional air conditioning using a heat pump. Food production Food production has often been included in historic autonomous projects to provide security. Skilled, intensive gardening can support an adult from as little as 100 square meters of land per person, possibly requiring the use of organic farming and aeroponics. Some proven intensive, low-effort food-production systems include urban gardening (indoors and outdoors). Indoor cultivation may be set up using hydroponics, while outdoor cultivation may be done using permaculture, forest gardening, no-till farming, and do nothing farming. Greenhouses are also sometimes included. Sometimes they are also outfitted with irrigation systems or heat sink-systems which can respectively irrigate the plants or help to store energy from the sun and redistribute it at night (when the greenhouses starts to cool down). See also Notes External links The Buckminster Fuller Institute is still in existence. B. Fuller left thousands of pages of notes to the university where he last taught. There is a section on Autonomous Houses in the Reality Sculptors wiki, including links to a mailing list which frequently discusses autonomous design considerations. Designs for a geodesic dome version of an Autonomous House can be found at reality.sculptors.com. "Wind Power for Home and Business" by Paul Gipe An opinion piece by Brenda and Robert Vale The Cropthorne House - notes on design and comparison with the Vales' Southwell House Bad End 2 - 21st Century Hobbit Hole - precast concrete in home construction Off-grid.net Self Sufficiency Guide Self Sufficient Living GreenSpec Building engineering Human habitats Low-energy building Sustainable architecture Sustainable building Self-sustainability Building Buildings and structures