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  "documentTitle": "Technology Mineral Criticality",
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  "notes": "The slide uses two line charts to show production trends indexed to 1980, highlighting growth rates before and after the 1991 technology inflection point.",
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      "text": "Before 1991 demand for cobalt and lithium was driven by industrial purposes. In 1991 Sony introduced a commercial lithium-ion battery. The rapid demand growth in batteries drove production growth.",
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      "text": "1 Lithium carbonate equivalent. SOURCE: USGS, WBMS, Press-search",
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