We have a lot of really solid evidence of significant
climate change going back at least
110 million years.  There is also
evidence back 65 million years, 600,000 years,
and 500 years.<p>For the last 2000 years there is<p>Committee on Surface Temperature
Reconstructions for the Last 2,000 Years,
National Research Council, &#x27;Surface
Temperature Reconstructions for the Last
2,000 Years&#x27;, ISBN 0-309-66264-8, 196
pages, National Academies Press, 2006.<p>still available at<p><a href="http:&#x2F;&#x2F;www.nap.edu&#x2F;catalog&#x2F;11676.html" rel="nofollow">http:&#x2F;&#x2F;www.nap.edu&#x2F;catalog&#x2F;11676.html</a>