Cardboard Solar Ovens
What a wonderful idea!
I think an altered solar oven would work in Antarctica or on Mount Everest.
Take a wire basket that has a hinged door, wrap it in aluminum foil 3 or 4 layers thick, and paint the outside black. Set this on a pedestal about 4 feet high, and surround the pedestal with mirrors angled to focus the light on the oven. Put your food inside, close the door, and in a few hours you should have a nice hot meal.
The size of the mirrors will be determined by the amount of sunlight. On a day with direct, bright sunlight, you could remove the mirrors. On a cloudy day, you would have to use large mirrors.
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