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Sharing knowledge to build rich, sustainable lives.

Appropedia is for collaborative solutions
in sustainability, appropriate technology, poverty reduction, and permaculture.

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your site to find, co-create and improve the solutions we need. Our vision and mission.

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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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Greywater Ecuador La lagrima purificadora

A detailed greywater system at Centro Orgánico Finca Sarita, an Ecuadorian seed saving center.

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Community action news

Critical Mass Chicago 050826.jpg
Nov 16 Chicago: Come for the fun, stay for the revolution [1]

Nov 14 Climate news 2017: Record Emissions: 41 Billion Tons of Heat-Trapping Carbon Dioxide Were Added to the Atmosphere This Year[2]

Nov 13 Climate news 2017: COP23: Where is the place for community-led initiatives? [3]

Nov 10 Towards sustainable economies news: Building resilience [4]

Nov 10 Spain: Climate Change Related Drought Bakes the Iberian Peninsula [5]

Read More...


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Hansen at the Our Opportunity student summit in March 2009
A global tipping point will be reached in 10 years [ 2016 ] if levels of greenhouse gases like methane and CO2 are not reduced. Global warming at this point becomes unstoppable.

James HansenW
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Hot topics / In the news

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Blog

Planted cattails at Millcreek greywater
Greywater, sometimes also spelled as graywater, grey water or gray water, is all of the effluent water from a household, such as water discharged from lavatories (bathroom sinks), bathtubs, showers, clothes washers, and laundry trays. Greywater is not wastewater from a sink used for food preparation, or water closet (toilet) wastewater.

The water leaving our homes carries nutrients and value. It may also contain pathogens, and/or harsh chemicals and care should be taken with it. However, it is not a great risk compared to blackwater (sewage).

Redirecting the water we use for tasks such as showering allows us to reclaim some of that value to grow plants and recharge the water table. It may be necessary to choose our soaps and detergents more carefully, if we use the greywater for watering and fertilizing plants.

Main portal: Water
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ENGR 215 Introduction to Design projects – Spring 2010: World Shelters: One lab of the Spring 2010 semester of Engineering 215 worked worked with World Shelters to design and improve upon structures by leveraging the resources of Haiti and World Shelters.

Spring 2010 ENGR 215 Intro to Design Projects - World Shelters
Simple Square
Reduces the amount of unique connecting pieces needed to construct World Shelter's JAS Shelter  
Rock Roots JAS
JAS Shelter retrofits to withstand a Class One hurricane  
Make it Complete with Papercrete
Inner wall system incorporates the use of papercrete, a weatherproof and fire resistant material  
Rubble to Resource
Rubble trench foundations utilize rubble to rebuild Haiti  
Bags of Shelter
Earthbag shelter designed for use as a transitional shelter  
Titanium Sun Shield
Primer and topcoat application over the polypropylene exterior of a WorldShelters temporary structure  
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