This book describes the basic principles and the major achievements of the borehole climatology.
The world-wide results of the borehole data analyses indicate, for example, that the increase in the mean air temperature in the 20th century is likely to be the largest of any preceding century of the past 1,000 years. The detailed study addresses the potential human impact on climate suggesting that there is certain evidence that at least part of the observed present-day global warming may be attributed to human activities. The text is illustrated with many examples from all over the world.