Earth resources*
AUTOR(ES)
Skinner, Brian J.
RESUMO
Reliable supplies of metals have historically been the keys to industrial and technological development. But many metals are subject to the possible exhaustion of traditional kinds of deposits. A continued supply of such metals, which include tin, tungsten, silver, lead, zinc, and many others, will require their recovery from common rocks, in which they are found in solid solution in common silicate minerals. Recovery from unconventional sources will be so energy intensive that we may eventually have to stop mining such metals. The greatest challenge facing the U.S. Geological Survey in its second century will be the problem of resource limitations.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=411542Documentos Relacionados
- Earth science and earth resources—A centenary salute to the U.S. Geological Survey: Introduction to the symposium*
- The dynamics of south-south space cooperation : the case of CBERS (China-Brazil earth resources satelite)
- The use of CBERS (China-Brazil Earth Resources Satellite) to trace the dynamics of total suspended matter at an urbanized coastal area
- THE GOOD EARTH
- Diatomaceous Earth Silicosis