The Chilling Stars, A Cosmic View of Climate Change
Hendrik Svensmark and Nigel Calder
Presents the theory that cosmic rays influence climate change much more than CO2. Explains how cosmic rays produce clouds which cool the earth. When the amount of cosmic rays decrease, there are fewer clouds, more sunlight reaches the earth, and temperatures increase.
Throughout earth's history temperatures have been either much higher or much lower than average. Those episodes are of widely varying lengths from hundreds to millions of years. The correlation between temperature and cosmic ray levels is much better than the correlation between temperature and CO2.
Possible reasons of why cosmic ray levels change are discussed and evidence is presented supporting the theory.
Alan Detwiler: rural resident, gardener, and advocate of self sufficiency and resilient living. Bio at http://www.smashwords.com/profile/view/alandetwiler