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A scientific look back instead of a wild guess for the future -

For temperatures on the earth records in the northern hemisphere can be reconstructed going back about 250 years.

The ups and downs of temperatures on the earth match exactly the ups and downs and changes in the magnetism and energy output of the sun.

With records of solar magnetism going back 1000 years, periods of low magnetism and lower energy are in step with the major changes in the Earth's climate.

Matching the decline in temperatures from the 1940s through mid-70s was a decline in the sun's magnetism.

The sun's magnetism has recently picked up and the global temperatures of late have, let me see, increased as well.

We wonder...is there, can there be a relation?

Baliunas, Sallie, and James Glassman. "Global Warming Results from Natural Causes." Contemporary Issues Companion: Global Warming. Ed. Shasta Gaughen. San Diego: Greenhaven Press, 2005. Opposing Viewpoints Resource Center. Thomson Gale. University of Phoenix - main account. 24 Jan. 2008