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Welcome to Appropedia

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.

Browse our categories or all 8,797 articles. Contributors have made 417,762 edits and uploaded 34,877 files.

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Announcements — more

To catch the rain cover.png Rainwater catchment around the world.
Get a paperback on Amazon or free digitally at http://www.tocatchtherain.org.


Appropriate Technology Engineering 305 class
Parabolic basket and tin can solar cooker. The objective of this project is to create a solar cooker out of local invasive species and waste materials. We want to create a device that can pasteurize water and be an alternative to the use of fossil fuels for cooking food. Our criteria for evaluating the appropriateness of technology are: use of local materials, efficiency, durability, ease of use, ease of construction, cost, impact on environment, impact on culture/lifestyle, education or expertise needed for construction. Overall this was a successful project. We were able to meet our goal of pasteurizing water. The solar basket can pasteurize water in a quart container in about an hour with optimal conditions. If we were to make the solar basket version 2.0, here are some changes we would make: 1. double up the blackberry runners so that the ribs of the basket are stronger; 2. use another material instead of pampas grass because it causes lumps on the basket's surface, maybe something softer; 3. use all large can lids, of the shiniest quality; and 4.construct the rings that hold the parabolic shape out of a less flexible material than the aluminum and wire that we found. Read more...
A safe incubator that will be used in local health centers in deveoping countries.
A safe incubator that will be used in local health centers in deveoping countries. Read more or check our book


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Community action news

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May 15 London news: Large areas of London to be made car-free as lockdown eased [1]

May 5 UK Climate news: Airline bailouts without climate conditions could be unlawful [2]

May 5 The full impact of Finland’s UBI experiment is in - improving wellbeing, cognitive confidence, and a sense of personal control [3]

May 4 Ethical consumerism: What could tourism become, post-Covid? Former "destinations" can build new livelihoods. And make new urban-rural connections [4]

Apr 30 Clean air in Europe during lockdown ‘leads to 11,000 fewer deaths’ [5]

Read More...



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Heraclitus, Johannes Moreelse
No man ever steps in the same river twice, for it’s not the same river and he’s not the same man.

HeraclitusW


Aleiha's parabolic solar cooker
In physics, energy is an indirectly observed quantity. It is often understood as the ability a physical system has to do work on other physical systems. Since work is defined as a force acting through a distance (a length of space), energy is always equivalent to the ability to exert pulls or pushes against the basic forces of nature, along a path of a certain length.

Sustainable energy is the provision of energy that meets the needs of the present without compromising the ability of future generations to meet their needs. Sustainable energy sources are most often regarded as including all renewable energy sources, such as hydroelectricity, solar energy and power, wind power, wave power, geothermal energy and power, biomass fuel and energy, and tidal power. It usually also includes technologies that improve energy efficiency.

While many renewable energy projects are large-scale, renewable technologies are also suited to rural and remote areas, where energy is often crucial in human development. As of 2011, small solar photovoltaic (PV) systems provide electricity to a few million households, and micro-hydro configured into mini-grids serves many more. Over 44 million households use biogas made in household-scale digesters for lighting and/or cooking, and more than 166 million households rely on a new generation of more-efficient biomass cookstoves.


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