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Sharing knowledge to build rich, sustainable lives.

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We develop knowledge to build rich, sustainable lives (read our vision and mission).

Explore solutions for sustainability, appropriate technology, poverty reduction, and permaculture. You are encouraged to add to and edit Appropedia with your original research on these subjects. To learn more about appropriate technology, we invite you to check Portal:Appropriate technology.

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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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Surrey Hills house
Surrey Hills house. In 2001, my partner Lena and I were faced with the prospect of living in a dark and dingy 1930’s duplex “one of a pair” solid brick dwelling built in 1930, renovating it, or buying another house. The old house had a maze of small pokey rooms. We viewed the high cost of selling and buying property, where a lot of money goes to the “middlemen and the taxman”, as a waste of money. We were really keen to make maximum use of the sun for heating and natural lighting, and decided to go ahead with renovating. We prepared a detailed brief covering our requirements, with a strong focus on low environmental impact features. After discussing the project with Andreas and Judy Sederof from Sunpower Design, we felt confident that we could achieve what we wanted, although the site and the existing dwelling presented challenges. It soon became clear to us that the expertise and ideas that experienced “sustainable and solar efficient” architects provide is invaluable. Read more...
Are you on a purified water grid? Frustrated at flushing your bodily waste with some of the cleanest drinking water in the world? Do something about it.
Are you on a purified water grid? Frustrated at flushing your bodily waste with some of the cleanest drinking water in the world? Do something about it. Read more or check our book
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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New pages being developed:
  1. RepRapable Automated Open Source Bag Valve Mask-based Ventilator
  2. Partially RepRapable Automated Open Source Bag Valve Mask-based Ventilator
  3. Real-Time Eye State Detection System for Driver Drowsiness Using Convolutional Neural Network
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  5. Bioreflector method
  6. Gestion micro-entreprises
  7. U.S. Greenhouse Gas Emission Bottlenecks: Prioritization of Targets for Climate Liability
  8. Open Source High-Temperature Reprap for 3-D Printing Heat-Sterilizable PPE and Other Applications
  9. The Famine Foods Database
  10. Vacuum Outgassing Characteristics of Unpigmented 3-D Printed Polymers Coated with ALD Alumina

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