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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 8,848 articles. Contributors have made 421,737 edits and uploaded 35,028 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.


Finished Vermicomposting System
CCAT's Vermicomposting Bin. I am very excited to be posting directions for building your very own home vermiculture bin! The methods employed will produce a bin appropriate for a household of 3-5 people and should last a number of years if constructed properly. There of course are many types of bin designs out there and I wanted the creative opportunity to design my own. In looking for ideas in a gardening magazine, I noticed a pentagon shaped planter for gardens whose shape I really liked. A pentagon is also practical because compost is less likely to get stuck in the corners as often happens in normal square shaped boxes, preventing the organic materials from cycling properly. I decided to make a two-part stackable bin so that using the finished compost would be easier. Once the compost is processed it is easy to take off the top section, dump the compost in the garden, and put it on top to be filled again. The partitioned design is also improves aeration to speed up the composting process. Aeration is also provided by the holes drilled in the sides of the bin. The bottom of each bin section is finished with wire mesh to keep the compost in place. The holes of the wire mesh are large enough to allow worms and microbes to enter the system and speed up decomposition. The top is simple plywood cut to size with a brass handle and L-brackets to keep the lid in place. The bin was lastly finished with natural organic linseed oil as a sealer for endurance in the elements and general durability. I hope you enjoy! Read more...
Spacer for asthma medications made from a 500cc plastic bottle.
Spacer for asthma medications made from a 500cc plastic bottle. Read more or check our book


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Community action news

Street Party Table.jpg

Aug 4 List of climate assemblies: In Budapest, Washington State, Paris - and Camden - Climate Assemblies are expressing voices, shifting priorities and setting policy [1]

Jul 27 France to ban heated terraces in cafes and bars [2]

Jul 15 Climate news 2020: Climate change: Siberian heatwave 'clear evidence' of warming [3]

Jul 3 Environment quality news: Sonic doom: how noise pollution kills thousands each year [4]

Jun 28 Towards sustainable economies UK: Just 6% of UK public 'want a return to pre-pandemic economy' [5]

Read More...



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Oliver Wendell Holmes Sr.
Man's mind, once stretched by a new idea, never regains its original dimensions.

Oliver Wendell HolmesW


Estuaries and coastal waters are among the most productive ecosystems on Earth.
Water is vital for all known forms of life. Covering 71% of the Earth's surface, it is found mostly in oceans and other large water bodies. 1.6% of the total mass of the Earth's water is below ground in aquifers and 0.001% is in the air as vapor, clouds, and precipitation (rain, snow and sleet).

The Earth's water moves constantly through a cycle of evaporation and transpiration (evapotranspiration), precipitation, and runoff, usually reaching the sea. Over land, evaporation and transpiration contribute to the precipitation over land - thus deforestation and other changes to land can have wide and long-lasting effects through their impact on the water cycle.

Some observers estimate that by 2025 more than half of the world population will be vulnerable to a lack of water. Appropriate water supply and water purification technologies can help.

Related portal: Greywater


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