Talk:Appropriate technology designs
Moved from page[edit source]
I'm moving some sections here which are not appropriate technology, or at least are highly debatable. (Debate and uninformed speculation is fine, but better here on the talk page than on the page itself.)
The following would need some kind of justification - is there any evidence that hair removal has a net positive effect on health?
Hair removal machine[edit source]
Perhaps hair removal and laser hair removal machines can be presented as appropriate technology (increase hygiene and thus decrease disease, ...) see for example the Rio Salon Laser Scanning Hair Remover. This machine or a low-cost derivated machine can be proposed (home-use, 200£).
The following is high technology and how close to "emissionless" it is depends on the source of the energy:
Hydrogen and oxyhydrogen generator[edit source]
A DIY hydrogen and oxyhydrogen generator should also be added. It allows to generate hydrogen which can fuel converted internal combustion engines (eg of old fixed-up cars/vehicles; found abundantly in the developed world).
DIY shematics/documents for electrolysis can be made from instructions such as in the following book: http://www.goodideacreative.com/h2_sys2.html , aswell as many other DIY low-cost generators can be found online; eg http://www.youtube.com/watch?v=NX-vbcaEEWA http://www.instructables.com/id/SODA-CAN-HYDROGEN-GENERATOR/ water4gas HHO generator
however, the best generator would be made using bacteria. Synthetic biology can be used to create a generator that uses no initial power (which is the major problem with hydrogen; more power needs to be generated than what is produced in hydrogen). However, at present it has not yet produced a viable organic hydrogen generator. 
- Ways to avoiding rare earth metals would be a positive step, too. --Chriswaterguy (talk) 00:50, 19 April 2012 (UTC)