He estimated rare earths contained in the deposits amounted to 80 to 100 billion metric tons, compared to global reserves currently confirmed by the U.S. Geological Survey of just 110 million tonnes that have been found mainly in China, Russia and other former Soviet countries, and the United States. ??ng ?????c t??nh ?????t hi???m ch???a trong c??c qu???ng n??y l??n t???i 8-10 t??? t???n, so v???