Tracing the ups and downs of the mercury

O'Leary, Jim
April 1996
Odyssey;Apr96, Vol. 5 Issue 4, p5
Presents ways of determining the earth's temperature in the past, which could be useful in predicting future effects of the atmosphere's warming. Examination of tree rings for a record of climate change; Information from cores drilled from ice sheets; Occurrence of a `Little Ice Age' from 1400 to 1850 A.D.


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