Collect the labels from the bottles of jam /sauces & find out the preservatives used in them. Write it in the copy. Are there any chemical preservatives used? Write bad effects?
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A preservative is a substance or a chemical that is added to products such as food products, ... Chemical preservation and physical preservation techniques are sometimes combined. ... This method is the most traditional and ancient type of preserving—ancient ... In ancient times the sun and wind naturally dried out foods.
Missing: copy. | Must include: copy.
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