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Describe two changes that are harmful. Explain why you consider them harmful. How can you prevent them? |
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Answer» Harmful changes:
Rusting of iron is harmful in the sense that it destroys iron articles slowly. As iron is used in making bridges, ships, cars, etc., it may cause huge monetary loss. Similarly decaying of fruits causes health hazards. Prevention: Rusting can be prevented by oiling, polishing and painting. Fruits can be preserved by keeping them at low temperature and by using some specific preservatives. |
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