Universe: Stars and Galaxies & CD-Rom & The Once and Future Cosmos pdf epub mobi txt 電子書 下載 2024


Universe: Stars and Galaxies & CD-Rom & The Once and Future Cosmos

簡體網頁||繁體網頁
0
105.00
9780716709466

圖書標籤:  


喜歡 Universe: Stars and Galaxies & CD-Rom & The Once and Future Cosmos 的讀者還喜歡




點擊這裡下載
    


想要找書就要到 小哈圖書下載中心
立刻按 ctrl+D收藏本頁
你會得到大驚喜!!

发表于2024-11-27

Universe: Stars and Galaxies & CD-Rom & The Once and Future Cosmos epub 下載 mobi 下載 pdf 下載 txt 電子書 下載 2024

Universe: Stars and Galaxies & CD-Rom & The Once and Future Cosmos epub 下載 mobi 下載 pdf 下載 txt 電子書 下載 2024

Universe: Stars and Galaxies & CD-Rom & The Once and Future Cosmos pdf epub mobi txt 電子書 下載 2024



圖書描述

Foreword<br > hotographs of the earth show that it has a green-blue color. The planet<br > acquired this pleasant distinction, it appears, after turning in the sun-<br >light for about three billion years. Solar energy, arriving at its surface at the<br >rate of two calories per square centimeter per minute, ignited the processes<br >of life in the primordial waters. The earth, in consequence, soon became<br >endowed with an atmosphere of approximately its present composition. For<br >about a billion and a half years the mixtures and compounds of the principal<br >constituents of the air and water--the light elements carbon, hydrogen, oxy-<br >gen and nitrogen--have been maintained in steady state by cyclic passage<br >through the tissues of plants, the animals that eat them, and the decompos-<br >ers of both. The biosphere-this thin film of air and water and soil and life<br >no deeper than ten miles, or one four-hundredth of the earth s radius--is now<br >the setting of the uncertain history of man.<br > The biosphere provides the context and perspective for consideration, in<br >this book, of the questions that are clustered in public discussion in the<br >United States today under the horizon-sweeping title of "Environment." The<br >very word has become a term of reproach, and a millenial anxiety pervades<br >the discussion. The classical Malthusian equation (in which production in-<br >creases arithmetically in the numerator and human reproduction increases<br >geometrically in the denominator) shows once again that population growth<br >must outrun the means of subsistence. The same logic argues that industrial<br >technology only hastens the despoliation of the earth s finite resources and<br >makes survival meanwhile a dubious privilege.<br > It is not enough to note the irony in the fact that such despair is charac-<br >teristically to be found among the most fortunate members of the few national<br >populations for whom the iron law of scarcity has been annulled. The mood<br >requires examination from a bigger set of premises supplied by enlargement<br >

Universe: Stars and Galaxies & CD-Rom & The Once and Future Cosmos 下載 mobi epub pdf txt 電子書

著者簡介


圖書目錄


Universe: Stars and Galaxies & CD-Rom & The Once and Future Cosmos pdf epub mobi txt 電子書 下載
想要找書就要到 小哈圖書下載中心
立刻按 ctrl+D收藏本頁
你會得到大驚喜!!

用戶評價

評分

評分

評分

評分

評分

讀後感

評分

評分

評分

評分

評分

類似圖書 點擊查看全場最低價

Universe: Stars and Galaxies & CD-Rom & The Once and Future Cosmos pdf epub mobi txt 電子書 下載 2024


分享鏈接





相關圖書




本站所有內容均為互聯網搜索引擎提供的公開搜索信息,本站不存儲任何數據與內容,任何內容與數據均與本站無關,如有需要請聯繫相關搜索引擎包括但不限於百度google,bing,sogou

友情鏈接

© 2024 qciss.net All Rights Reserved. 小哈圖書下載中心 版权所有