why are food Prefeably packed in aluminium foil
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Explanation:
it keeps your food hot and there is no emission of harmful gases
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Because aluminium foil have properties that help in keeping food packed inside it fresh for a long time as it acts as a barrier against light and oxygen, odours and flavours and moistness and germs, thus avoiding food decay. This also helps in stopping the fats in the food oxidising or turning rancid.
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