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Question:
Make a list of items where substitutes are being used instead of minerals. Where are these substitutes obtained from?
Answer:
- 'Oil and natural gas' can be substituted for coal.
- Wood/plastic can be substituted for iron, steel, and copper.
- Artificial jewellery made from plastics can be substituted for gold and silver jewellery.
Most of the substitutes used are obtained from natural resources.
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