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Revision as of 14:34, 2 December 2015

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Sharing knowledge to build rich, sustainable lives.

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Emilio-thumb.png Emilio Velis has been appointed the new Executive Director of the Appropedia Foundation! Read more...


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The Earthen Ox Oven at the Blue Ox Mill
Blue ox earthen oven. The earthen oven at the Blue Ox Millworks in Eureka, California was constructed in 2004 by Appropriate Technology (Engr305) students at Humboldt State University. The project took four, three-hour work sessions to complete over a total of four weeks. As of 2007 it is still standing, is in immaculate condition and retains nearly the same heating efficiency as when it was first constructed. This page includes information on the construction of the Blue Ox earthen oven and information and updates on its current condition.

Earthen Ovens have been used for thousands of years by cultures all over the world and they are still built today by people all over. Earthen ovens are made up of just that, EARTH! Sand, clay and straw are used in building these versatile ovens.

An earthen oven can be used to cook the same things cooked in a normal household oven, so long as you can fit it through the door! Often Earthen Ovens are somewhat unique from other ovens in that they don’t have a fire burning continuously to cook with. The oven is heated before any cooking is going to take place. Generally Earthen Ovens are fired for a few hours and the hot coals are then scraped out of the interior. Once the coals are scraped out, the oven is ready to cook in.

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Hexayurt Project

The Hexayurt is a refugee shelter system that uses an approach based on "autonomous building" to provide not just a shelter, but a comprehensive family support unit which includes drinking water purification, composting toilets, fuel-efficient stoves and solar electric lighting. 8/15/07 Update: Winner of the Treehugger Participate! contest for Burning Man.

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Community action news / Hot topics

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Blog

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John Muir
When one tugs at a single thing in nature, he finds it attached to the rest of the world.

John MuirW
Estuaries and coastal waters are among the most productive ecosystems on Earth.
Water is vital for all known forms of life. Covering 71% of the Earth's surface, it is found mostly in oceans and other large water bodies. 1.6% of the total mass of the Earth's water is below ground in aquifers and 0.001% is in the air as vapor, clouds, and precipitation (rain, snow and sleet).

The Earth's water moves constantly through a cycle of evaporation and transpiration (evapotranspiration), precipitation, and runoff, usually reaching the sea. Over land, evaporation and transpiration contribute to the precipitation over land - thus deforestation and other changes to land can have wide and long-lasting effects through their impact on the water cycle.

Some observers estimate that by 2025 more than half of the world population will be vulnerable to a lack of water. Appropriate water supply and water purification technologies can help.

Related portal: Greywater
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ENGR 215 Introduction to Design projects – Spring 2011: Locally Delicious: The Spring 2011 semester of Engineering 215 worked with Locally Delicious to design, build, test and disseminate projects that support healthy lifestyles among youths grades 4th through 6th and their families.

Spring 2011 ENGR 215 Intro to Design Projects - Locally Delicious
Tear the Roof off
Dry sliced apples in 18 hours of sunlight with this legless solar dehydrator  
The GnomeTainer
Modular, raised garden with integrated rain catchment that can be installed on a porch  
Catch and Cook
A solar oven capable of reaching 160°F in 20 minutes  
Solar Bowling Oven
Solar oven kids can build and use on their own  
Wormland worm bin
Scalable vermiculture system from free materials for kids  
Row Blender
Row yourself a smoothie with an exercise powered blender  
Sodhoppers' Solar Dehydrator
Durable food dehydrator for a school from a waste kitchen cabinet  
Interactive School Garden
Modular school garden design incorporating several different garden styles  
The Solar Swing
Solar oven for a school reaching 200°F in 30 minutes  
School Worm Bin
Worm bin for a school built from a 55 gallon drum  
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