Not easy to read but convincing

The book entitled "Unstoppable Global Warming - Every 1,500 Years" is not easy reading. Every chapter is replete with scientific references, filling one to seven pages at each chapter's end.
 
But the development of the 1,500 year cycle is fascinating, beginning with ice cores from the Greenland ice sheet and shifting to the other end of the earth and the Antarctic Vostok glacier, with corroborating evidence around the world, such as tree rings, sea bed deposit evidence, and cave stalagmites.
 
However, evidence of the past 30,000 years linking earth's temperatures to the sun's irradiance (sun spot activity) also shows the 1,500 year cycle. Sunspot activity occurs in 87-year and 210-year cycles, together totalling 197 years. Five such cycles total 1,485 years.
 
For proponents of human-caused global warming (Al Gore and the media, take note), it would be necessary to show that all this scientific evidence is somehow caused by the last 100 years of the human industrial age. Mankind awaits proofs of any such verdict.


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STUART H. JONES
Yuma