CO2 concentrations are a significant controlling or driving factor
Main Entry: sig·nif·i·cant
1 having meaning; especially
2 having or likely to have influence or effect
3 probably caused by something other than mere chance
The word "significant" does not mean large. Scientifically it means the effect is real and not caused by random noise in the data -- even though the effect could be small. It does not mean a major driving force. The word is misused quite frequently by environmental "scientists".
Solar variability has been factored in, and measured. It's not a factor right now.
How can it be factored in without being a factor? Computer models using computer models do a poor job of predicting climate. Calculations using solar changes have successfully predicted El Nino several years in advance. However, climate change via solar modulation of cosmic ray flux is a major, indisputable factor.
The petition was accompanied by a paper that was made to look like a Proceedings of the National Academy of Sciences (PNAS) paper
From the NAS declaration:
That's it? They used the same format. That makes it a hoax? That's how they silence the voice of 20,000 doctorates saying "NO" to the Kyoto treaty? What about the poll of the 600 state climatologists saying essentially the same thing?