using raw materials in the area and affordable upcycled stuff this oven is almost free and works fine
the major insulation is made by earth and black sand atract sun rays and is a thermal storage that can be glued with any natural glue while a thin layer of calcium carbonate used as solar reflector can be applied after compacting sand with water with a flat profile
by pouring water over greenhouse plastic the magnifying lens created can boil the food
a thin black clay pot can be used for cooking
solar oven cooker cooking food
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