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Revision as of 13:53, 2 December 2015

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Sharing knowledge to build rich, sustainable lives.

Appropedia shares knowledge to build rich, sustainable lives (read our vision and mission).

Explore collaborative solutions in sustainability, appropriate technology, poverty reduction, and permaculture. You are encouraged to add to and edit Appropedia with your research on these subjects.


Browse our categories or all 8,690 articles. Contributors have made 412,435 edits and uploaded 34,208 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.


The First Rice Hull House
Rice Hulls in Construction. The rice hulls are unique within nature. They contain approximately 20% opaline silica in combination with a large amount of the phenyl propanoid structural polymer called lignin. This abundant agricultural waste has all of the properties one could ever expect of some of the best insulating materials. Recent ASTM testing conducted R&D Services of Cookville, Tennessee, reveals that rice hulls do not flame or smolder very easily, they are highly resistant to moisture penetration and fungal decomposition, they do not transfer heat very well, they do not smell or emit gases, and they are not corrosive with respect to aluminum, copper or steel. In their raw and unprocessed state, rice hulls constitute a Class A or Class I insulation material, and therefore, they can be used very economically to insulate the wall, floor and roof cavities of a super-insulated Rice Hull House. This paper also explains how the structure of such a house can be fashioned out of a variety of engineered lumber products derived from sugarcane rind.
Hydroponic Vertical Garden at Sembradores Urbanos

Hydroponic Vertical Garden at Sembradores Urbanos. a non profit in Mexico City dedicated to transforming urban areas into green, productive, and sustainable spaces.

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Hot topics / In the news

Helen Keller
The mystery of language was revealed to me. I knew then that ‘W-A-T-E-R’ meant the wonderful cool something that was flowing over my hand. That living word awakened my soul, gave it light, joy, set it free.

Helen KellerW
You can have a green Christmas.
Green living (or sustainable living) is about practical choices, large and small, to preserve the earth and have a better quality of life. It is a lifestyle that attempts to reduce an individual's or society's use of the Earth's natural resources and his or her own resources.

In order to make sustainable choices, it is very helpful to have solid, reliable information that tells us which behaviors are sustainable and which are unsustainable. In quantitative terms, which actions will make the greatest difference, and should be prioritized. Green living can be high tech (buying a hybrid vehicle), low tech (green cleaning, or completely "back to nature." It can be smart grid or off the grid. Sustainable city living explains some of the areas of action for a city dweller.

Practitioners of sustainable living often attempt to reduce their carbon footprint by altering methods of transportation, energy consumption and diet. Proponents of sustainable living aim to conduct their lives in ways that are consistent with sustainability, in natural balance and respectful of humanity's symbiotic relationship with the Earth's natural ecology and cycles. The practice and general philosophy of ecological living is highly interrelated with the overall principles of sustainable development.

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Engr305 Appropriate Technology Projects: Below are selected service learning projects from Engr305 Appropriate Technology, which is a course on appropriate technology at Humboldt State University taught by instructor Lonny Grafman.

Treadmill-a-volt treadmill powered charging

Treadmill power for the Humboldt Bay Center for Sustainable Living  
Troubleshooting the AEF photovoltaic system

Troubleshooting, repairing, testing and maintaining a preexisting off-grid photovoltaic system  
Tule Fog Farm Grassfed Shed

An indoor space for pigs and goats that also restores a previous brownfield while improving the overall natural landscape  
Umbrella solar cooker

A multi-use solar cooker  
Wild Chick Farm

A commercial pastured chicken operation in Arcata, California  
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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. Catchfood
  2. List of low-carbon conferences
  3. Academic air travel
  4. Big Pedal
  5. Atomic layer deposited aluminium oxide mitigates outgassing from fused filament fabrication–based 3-D printed components
  6. Herman Jia Zheng
  7. Abuelita's Garden Engr305 project 2020
  8. CCAT solar bug out box
  9. Union School energy learning station
  10. CCAT rainwater 2020

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