Man Only Scratched Earth’s Surface
Scientists are not sure whether factories are using up the world’s minerals or whether there are plenty more to be found.
Sir Henry Tizard told the Empire Mining and Metallurgical Congress: “Oum. methods of finding minerals may be out of date. “Most coal, oil and ores have been found accidentally in cutting railway tracks or by wandering prospectors. But we can no longer rely on such accidents. The mining geologist must become an applied physicist.
“From the earth, 20 cubic miles of coal, one cubic, mile of oil and one cubic mile of ores have been extracted; but we have only scratched the surface, because l ' there are 60-million cubic miles of land to a depth of one mile.”
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https://paperspast.natlib.govt.nz/newspapers/BPB19491219.2.10
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Bay of Plenty Beacon, Volume 14, Issue 78, 19 December 1949, Page 4
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124Man Only Scratched Earth’s Surface Bay of Plenty Beacon, Volume 14, Issue 78, 19 December 1949, Page 4
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