The two devices which can be utilised for the cooking of food so as to save fuel are and .

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The two devices which can be utilised for the cooking of food so as to save fuel are pressure cookers and solar cookers.
Pressure cookers and solar cookers should be used to cook food whenever possible, and as well as solar water heaters should be used to get hot water. A solar cooker is made up of an insulated metal box or wooden box, which is painted all black from the inside. Burning fuels such as wood and gas pollute the air and contribute to climate change. Solar cookers provide a pollution-free alternative. And A pressure cooker is a sealed chamber that traps the steam generated as its contents are heated. As steam builds, pressure increases, driving the boiling point of water past 212°F. In general, this higher temperature shortens cooking times and, due to a lack of evaporation, extracts flavour more efficiently from foods.

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