As in the US National Academy of Sciences report in<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><p>(1) the temperature in 2006, and, thus, also now, is essentially the same as in the year 1000 and<p>(2) there was a rapid rise in temperature from year 900 to year 1000.<p>But for the temperature increase from year 900 to year 1000, the usual arguments about CO2 from human activity do not apply.  Apparently CO2, from humans or anything else, had nothing to do with it.<p>So, the current temperature and the rise of the past 100 years also happened between year 900 and year 1000.  Can&#x27;t blame humans for the
rise from 900 to 1000.  And, since the rise of the past 100 years is much like 900 to 1000, it doesn&#x27;t have to look like &quot;something is up&quot; now, especially not human activity.