Water
boils at standard sea level at 100° C. At 12,000 ft (3658 m) it boils at 87.6° C
and at 15,000 ft (4572 m) at 84.5° C. You can use dried dung in Tibet for fire
or you use quite another method. One can use the energy of the sun. There are
already large photovoltaic power plants, but I mean another way of collecting
the sun’s heat.
Solar
cooking technology consists of a large parabolic cooker, which uses reflectors
to concentrate sunlight to a point, where you put the water kettle or the
cooking pot. The parabolic reflector might be made of cardboard covered with a
reflecting foil like being used to wrap provisions.
Links:
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