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Sharing knowledge to build rich, sustainable lives.

Appropedia is for collaborative solutions in sustainability, appropriate technology and poverty reduction.

All are welcome to to add to and edit Appropedia. This is your site, to find, co-create and improve the solutions we need. See our Mission.

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Diagram of compost
Building compost guide. There are many ways to build a good compost. This page shows a method that comes from a rural, developing world perspective, although it could easily be used or adapted elsewhere. The aim is to build a quick decomposing hot compost that is made from locally available materials, which can easily be gathered and built in a rural setting. The work in building a large compost is often shared amongst a number of people, with the final compost being used by each one when appropriate.

The method of building compost can be different depending on the amount of compost required, materials available, type of compost and particularly the climate of the region.
Pit compost: Pit compost is ideal for areas with medium to low rainfall. The depth of the pit will depend upon the amount of rainfall. The less the rainfall the deeper the pit should be to prevent the rapid loss of water, which is essential in the natural production of compost. In some dry regions it has been known for pits to be dug as deep as 3ft. For example, this type of compost is used in the dryer and warmer parts of central and northern Uganda. (more types follow)

Photovoltaic vaccine refrigeration at Centro De Salud

Building a solar powered (photovoltaic) vaccine refrigerator with a community hospital in Northern Mexico. Now the sun helps keep the vaccines consistently cold.

Rachel Carson
The more clearly we can focus our attention on the wonders and realities of the universe around us, the less taste we shall have for destruction.
— Rachel Carson
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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