到2000年,随着人口的增长和世界工业的发展,矿产的消费将继续增长。世界的矿产资源是否足以满足世界范围的日益增长的社会需求已经重新成为令人关注的话题。对矿产资源枯竭性危险的预告是众所周知的,人们已经开始提及在本世纪中叶出版的佩利报告(Paley Report)中所 By the year 2000, as the population grows and the world’s industry develops, the consumption of minerals will continue to grow. The world’s mineral resources are sufficient to meet the growing needs of the community worldwide has returned to become a topic of concern. Foreclosures of the dangers of depletion of mineral resources are well known and people have begun to refer to the Paley Report published in the middle of this century