David F Mayer said:
This graph gives the false impression that the warming is of recent origin.
About a graph that shows a temperature increase between the years 1880 and 2000.

I would suspect that the scientific instruments that were used during that time period were relatively accurate, therefore the information should be accurate and not false.

On the otherhand, there is doubt about the accuracy of the other graphs due to a variety of uncertainties in the information.

As described in the following site.
Link:
http://www.realclimate.org/index.php?p=180#more-180

(Muscheler et al., 2005) should remind us that the variations of the solar activity are not yet completely understood.
Regardless of any discussion about solar irradiance in past centuries, the sunspot record and neutron monitor data (which can be compared with radionuclide records) show that solar activity has not increased since the 1950s and is therefore unlikely to be able to explain the recent warming.

So David could you explain your reasoning.

What year was it that people started experimenting with radioactivity?