Why is rusting of iron is a cause of concern for countries
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Explanation: Rusting is harmful because it destroy the quality of metal and also reduce its strength.then we have to invest more on it
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Answer: many submarines are made up of iron so they are painted to prevent rusting rusting occurs fast in sea water so they have to painting it again and again after some intervals of time . Imagine the loss of money just due to rusting of iron
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