I have just completed a trek in the Langtang Valley in Nepal, a remote location by any standard. As I observed how people in such an isolated part of our planet live, I noticed some interesting things.  In a tea house at the very top of the valley, the highest elevation at which people live, I sat in the kitchen and watched our hostess prepare breakfast on a huge cast iron stove that could only have been delivered by helicopter. One evening in the dining area of another tea house, a ...

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