While we're at it, check out http://www.lowtechmagazine.com/2014/06/thermal-efficiency-cooking-stoves.html http://www.lowtechmagazine.com/2014/06/thermal-effici

While we're at it, check out http://www.lowtechmagazine.com/2014/06/thermal-efficiency-cooking-stoves.html http://www.lowtechmagazine.com/2014/06/thermal-efficiency-co... . I found this on the human-powered cranes article (https://news.ycombinator.com/item?id=10499228 https://news.ycombinator.com/item?id=10499228) -- and it's arguing that the developed world should go back to open cooking fires! Admittedly, the argument isn't very strong (the grid may be dirty, but it's not _that_ dirty); but it's interesting and strange that it can be made at all.