Discuss the present importance and the future prospects for the production of petroleum, sand and gravel, phosphorite, manganese nodules and crusts, and rare-earth elements.
Discuss the present importance and the future prospects for the production of petroleum, sand and gravel, phosphorite, manganese nodules and crusts, and rare-earth elements.
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Discuss the present importance and the future prospects for the production of petroleum, sand and gravel, phosphorite, manganese nodules and crusts, and rare-earth elements. |
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