The Tibetan tents are the other extreme - very low embedded energy, quick to build or erect, but a major health hazard to the occupants. Minor improvements in the design can drastically improve the quality of life for the occupants.

What's the health hazard? fumes?

Peter.

The World Health Organisation (WHO) estimates that toxic emissions from cooking stoves are responsible for causing 1.6m premature deaths a year, half of them among children under five years old. In China 83m people will die from lung cancer and respiratory disease over the next 25 years, according to a recent report from Harvard University.

http://www.economist.com/sciencetechnology/tq/displayStory.cfm?story_id=...