Welcome to Appropedia

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Sharing knowledge to build rich, sustainable lives.

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

You are welcome 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 286,652 edits and uploaded 22,529 files.
Browse our categories or all 6,280 articles.

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Announcements — more

Windmillprint-crop.jpg Yes it is possible to print a windmill with a 3D printer for a fraction of the cost of manufacturing one conventionaly. Learn more about open-source 3-D printing of open source appropriate technology for sustainable development.


The Geysers in Northern California.
Geothermal power is generated from the high temperatures that can be found in various parts of the earth's crust such as volcanoes, hot springs, and geysers. The water that surrounds and fills the gaps between the rocks in the crust is raised in temperature by these natural processes. This hot water is then pumped to the surface and its steam is captured and used to create electrical power through a turbine system.

There are three common types of geothermal power: dry steam, flash steam, and binary cycle. Dry steam is rare and uses the steam directly from the earth, flash steam pumps the hot water that naturally occurs in the earth to the surface and utilizes its steam, and binary cycle uses a secondary fluid and its vapor to power a generator.

Dry stream geothermal plants use natural steam directly from the Earth. Once the steam pocket is tapped, the steam is channeled directly into a turbine which converts the thermal energy into electrical power. (more types follow)

Occidental_greywater

Greywater without land. A five stage, activated sludge greywater system in drums.

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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The Parras Summer Program, in Parras,W, Mexico is a summer immersion in Appropriate Technology, globalization and Spanish language and culture. See the Parras Invitation for more information.

Most of the Parras2005 group near Perote  
Most of the Parras2006 group near Perote  
Most of the Parras2007 group farming  
Most of the Parras2008 group near Perote  

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Selected categories

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Construction zone — correct mistakes & flag spam as needed

Newest articles more Wanted pages - click to add info more
Under construction
New pages being developed:
  1. Low force buckles and snaps for easy assembly/dis-assembly of mating parts
  2. The Haus of Greenery
  3. Cost of bicycle parts
  4. Newspaper Briquette Maker
  5. Black Mamba Bike pedal
  6. Clamps: "Wooden" Handscrew Style
  7. OSAT Wind Turbine
  8. Chicken Feed Holder
  9. Clamps with Gearing Systems
  10. Bike rack

Note: Appropedia's newest pages may not yet comply with our policies. Page titles in italics are "redirects," often created when moving a page.

Under construction

Create a new page:

  1. Animals
  2. Organic waste
  3. Nutrition
  4. Ecosystem
  5. Human development
  6. Clay
  7. Environmental science
  8. Appropriate energy overview
  9. Building management systems
  10. Open sustainability

These red links are invitations for you to contribute your knowledge.

Or create a page on the topic of your choice.

Newest files - images and documents that can be added to pages more

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We want your projects, current works, observations and wisdom! See Contributing content. Improve articles by clicking "edit" at top of the page or section. Our philosophy is: Be Bold and contribute!

Questions? Comments? Visit the Village Pump. Also discuss Appropedia and related topics over on the Permies permaculture forums.

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