Interesting. This is my field, so call me biased, but I think biofuels, even in wilderness, are the future, and hold every advantage over petrochemicals fuels. Big differences between the top-lit and the open design stoves in your post are thermal efficiency and conservation of the char. The latter factor is actually a very important and close bio-mimicry of the effects of natural wildfire. Residual char preserves more biomass than the fire that created it consumes. Sounds counterintuitive, I know, but its a function of the char reamaining in the soil essentially indefinitely, and retaining nutrients that would otherwise leach out. There is a very good case to be made that small, responsibly managed wood fires, at all elevations, yes, even in foxtail pine community, are more beneficial than fire prohibitions.
