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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 8,849 articles. Contributors have made 421,540 edits and uploaded 34,994 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.


A treadle pump being demonstrated in Malawi.
A treadle pump is a human-powered Pump designed to lift water from a depth of seven meters or less. A Treadle is a lever device pressed by the foot to drive a machine, in this case a pump. The treadle pump can do most of the work of a motorized pump, but costs considerably less (75%) to purchase. Because it needs no Fossil fuel (it is driven by the operator's body weight and Leg Muscl]s), it can also cost less (50%) to operate than a motorized pump. It can lift five to seven cubic meters of water per hour from wells and Boreholes up to seven meters deep and can also be used to draw water from Lakes and Rivers. Many treadle pumps are manufactured locally, but they can be challenging to produce consistently without highly skilled welders and production hardware. Compared to bucket irrigation, the treadle pump can greatly increase the income that farmers generate from their land by increasing the number of growing seasons, by expanding the types of crops that can be cultivated, and improving on the quality of grown crops. Read more...
Turning corn cob agricultural waste into a cooking fuel that combats deforestation and indoor air pollution.
Turning corn cob agricultural waste into a cooking fuel that combats deforestation and indoor air pollution. Read more or check our book


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Community action news

France1.jpg

Jul 27 France to ban heated terraces in cafes and bars [1]

Jul 15 Climate news 2020: Climate change: Siberian heatwave 'clear evidence' of warming [2]

Jul 15 California news: The SEED grows: after 2 years of a basic income experiment, the residents of Stockton, Cal., are on the uplift [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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Vinay Gupta (left), inventor of the Hexayurt.
All exceptional abilities initially arise as defenses.


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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