Malinga ndi lipoti la The United States Geological Survey (2014), nkhokwe zotsimikizirika za graphite zachilengedwe padziko lapansi ndi matani 130 miliyoni, pomwe nkhokwe za Brazil ndi matani 58 miliyoni, ndi China ndi matani 55 miliyoni, kukhala pamwamba padziko lonse lapansi. Lero tikuwuzani...
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