1. 2010-07-20 We often come across interesting material related to articles in EDN that could not fit into the available space in the issue. We share the most relevant of those here.
  2. 2010-07-20 One high quality and universally available source of all the major macronutrients (nitrogen, phosphorus and potassium) is human urine. Using human urine as fertilizer is not unprecedented, but for various reasons in most countries it is not commonly considered as an option, especially for growing...
  3. 2017-10-03 There are many appropriate building technologies available. How environmentally friendly are they? Earthquake resistant? Typhoon resistant? How can we introduce new materials to a traditional construction culture? Why would we want to produce our own materials? How can we make production...
  4. 2002-01-01 A composting toilet is any system that converts human waste into compost through the natural breakdown of organic matter. The photo above shows a composting toilet from the late 1800’s. Composting toilets provide a sanitary method to recycle human waste while conserving water and protecting the...
  5. Some Thoughts on Sanitation and the Environment ”The Western type of toilet system cannot solve the problem of getting rid of excreta in Third World countries. Nor, indeed, has it solved those problems in the developed world. The Western system is expensive. It uses large amounts of clean water...
  6. Composting toilet (CT) technology is not new to Vanuatu. Before independence, some of the rural schools on Ambae and North Efate, like Onesua, were using these toilets. The CT design in this manual was adapted from a toilet used in Tonga, Kiribati and Fiji. There are many advantages CTs have over...
  7. 1999-01-19 We do not recycle waste. It’s a common misuse of semantics to say that waste is, can be, or should be recycled. Resource materials are recycled, but waste is never recycled. That’s why it’s called “waste.” Waste is any material with no inherent value that is discarded and has no further use. We...