The global environment consists of the atmosphere, the hydrosphere and the lithosphere in which the life-sustaining resources of the earth are contained.
全球环境由大气圈、水圈和岩石圈所组成，其中包含了维系地球上生命的资源。
It looks at the role water plays in sustaining life, the problems of conservation, the use of minerals and metals and the need for renewable resources, such as biomass, solar and geothermal power.
书中包含了很多人类不得不面对和解决的问题，如：水资源对人类生存的重要作用，环境保护问题，对矿产资源和金属资源的利用，对可再生资源的需求，如：生质能发电、太阳能发电和地热发电。
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