The Changing Global Environement

Cover
S. Fred Singer
Springer Science & Business Media, 31.03.1975 - 423 Seiten
We know a great deal about historical climate and its variations from various geo logical studies. There are two points worth remarking on. One is that the climate changes frequently and radically, but that the degree of variation and even sense of variation depends on the time scale which we are considering. Secondly, that this is a most unusual geological period for the Planet Earth; we are living in a period of mountain building and glaciations, whereas during most of the last 250 million years (m.y.) there was little ice and little topography. A good view of climate change of the last hundred m.y. can be gained by looking at the paper of Kellogg. We are now in a period of extensive glaciations. The previous interval occurred 300 to 250 m.y. ago, when even the Sahara was glaciated. (Of course, it was at that time near the position of the South Pole; we know that 300 m.y. ago the continents had not broken apart and formed one land mass.) Apparently between 250 and 20 m.y. ago there was little ice on the Earth, even at Antarctica. Continental basins were flooded by shallow seas. This was the period when plant life and marine life proliferated and when most of our fossil fuels were laid down.
 

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Inhalt

II
3
III
7
IV
13
V
25
VI
47
VII
49
VIII
57
IX
73
XVIII
197
XIX
235
XX
273
XXI
275
XXII
295
XXIII
311
XXIV
329
XXV
339

X
79
XI
83
XII
111
XIII
125
XIV
137
XV
139
XVI
149
XVII
175
XXVI
341
XXVII
367
XXVIII
377
XXIX
401
XXX
405
XXXI
416
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Seite 426 - Pollution is an undesirable change in the physical, chemical, or biological characteristics of our air, land, and water that may or will harmfully affect human life or that of other desirable species, our industrial processes, living conditions and cultural assets; or that may or will waste or deteriorate our raw material resources...

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