This diagram clearly invalidates several premises in THE GREAT GLOBAL WARMING SWINDLE : it shows that Carbon Dioxide increases in the atmosphere are highly correlated to global warming, and that solar sunspot activity changes are not.
Source : http://earthguide.ucsd.edu/globalchange/global_warming/03.html
"The result is the graph below, showing that CO2 forcing can explain the temperature rise. That said, there may also be a role for the Sun in modifying the temperature rise driven by greenhouse gases. The minor drops in temperature right after 1900 and after 1960 coincide with reduced solar activity. To be sure, while this simple calculation may be enough to explain the observations, it is not a mathematical proof that the warming that has occurred since the days of James Watt is entirely due to human activity. It merely represents the simplest possible explanation.
Another way of stating the situation is this:
There is no compelling evidence that the observed overall warming in the 20th Century is anything but man-made.
The burden of proof is on those who would have us think that natural causes are solely or mainly responsible for this trend.
Of course, showing that the observed warming entirely agrees with reasonable expectations for the rise in carbon dioxide does not exclude the possibility that some of this warming would have occurred anyway, without human help. But the warming of the past 30 years, from 1970 to the present, is unexplainable by any known natural cause. In any case, considerable further warming is very likely if emissions continue as in the past."
