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Sharing knowledge to build rich, sustainable lives.

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

You are encouraged to add to and edit Appropedia -
your site to find, co-create and improve the solutions we need. Our vision and mission.

Contributors have made 396,557 edits and uploaded 32,003 files.
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To catch the rain cover.png Rainwater catchment around the world. Get a paperback on Amazon or free digitally at http://www.tocatchtherain.org.


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There are four basic Hexayurt sizes which cover a variety of needs.
What is it? The Hexayurt is a refugee shelter system based on work done at the Rocky Mountain Institute. It 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. Other systems can be added in a modular fashion.

Is this for real? Yes. Both the American Red Cross and the US Department of Defense have examined the Hexayurt system in detail and found that it has considerable merit and utility. I hope that we will see it in use by international agencies within two years. The best place to get started is to read the slides from the presentation Vinay Gupta gave at the Pentagon in December 2006: Pentagon Presentation (pdf) - 20 pages, not much text, and the best summary of the system we currently have online.

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UABJO Demonstration Wetland Wastewater Treatment, Reclamation, and Outreach

A wetland waste water treatment and reclamation plant that is part of UABJO's Outreach program in Oaxaca, Mexico.

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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
Sharing knowledge to build rich, sustainable lives.
Appropedia is the site for collaborative solutions in sustainability, poverty reduction and international development through the use of sound principles and appropriate technology and the sharing of wisdom and project information. It is a wiki, a type of website which allows anyone to add, remove, or edit content. Registration is encouraged but not required for contributors.

Appropedia has been described as an "appropriate technology wiki," but it is much broader than that - it is a green wiki, and a wiki for all matters of international development and aid. But most importantly, Appropedia is an open site for stakeholders to come together to find, create and improve scalable and adaptable solutions. For more about our motivation, see Appropedia:Mission.

To create a new project page, first browse the project articles and subcategories below for examples and check for possible collaboration opportunities, such as articles similar to what you're considering writing. If you are looking for ideas for your own project, check out our suggested projects. It is highly encouraged to tag your projects with their status -- you can do this with a few templates. Be Bold!

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ENGR 215 Introduction to Design projects – Fall 2008: Full Belly Project: The Fall 2008 semester of Engineering 215 worked with the Full Belly Project to adapt their Universal Nut Sheller in the following three manners:

Fall 2008 ENGR 215 Intro to Design Projects - Full Belly Project
The LC sheller
Innovating concrete with sawdust and clay to lower the costs and weight using materials available in some parts of Western Africa  
The Full Bell
Improves the original UNS by reducing the cost and increasing durability of the sheller  
Hot Dang Plastic Encasement
Waste plastic bags available in Haiti cleaned, cut, crocheted and ironed into a hard plastic mold  
Pressed Plastic
A process to thermoform waste plastic bags to form molds for nut shellers using resources available in Haiti  
Nutsy
Shaped like an acorn the Nutsy aims to be a smaller, more portable, and more aesthetically pleasing version of the UNS for marketing within the US  
Multiplicity
Smaller U.S. prototype with exchangeable rotors for different size nuts  
Simple Simon
Smaller US prototype made from wood and aluminum  
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New pages being developed:
  1. Mechanical Properties and Applications of Recycled Polycarbonate Particle Material Extrusion-Based Additive Manufacturing
  2. Open Learning Planet
  3. Fruit and nut harvesting sheet
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  6. Computer vision based real-time 3D printing analysis
  7. Mechanical Properties of Ultraviolet-Assisted Paste Extrusion and Postextrusion Ultraviolet-Curing of Three-Dimensional Printed Biocomposites
  8. Computer vision and macine learning background
  9. Love your local market
  10. Caster and Wheel Maintenance Guide

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