Yet another lame excuse for not accepting human contribution to global warming has started to lose even more credibility. A recent report of a study undertaken by scientists in the United States (I didn't know we were allowed to study the environment!), Germany and Switzerland is stating that over the 11-year sunspot cycles the sun's brightness has only varied by .07%.
They looked at records going back to the 1600's and concluded that there was little solar warming or cooling and that sea sediment suggest that there have been no "dramatic shifts" in solar energy output for the past 1000 years.
Basically, the report says that you can't blame the sun for the recent trend in global warming. That leaves us with cosmic rays, UV radiation or even possibly the emission of greenhouse gases though the burning of fossil fuels. Who ever would have thought?
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