The first thing one needs to recognize about the GCCI report is that it is not a scientific document — it is a 170-page long press release from an advocacy group, with all the detailed, thorough science one might expect in a press release from the Center of Science and Public Interest writing about the threat to mankind from Twinkies. By the admission of the Obama administration, this is a document that has been stripped of its scientific discussion and rewritten by a paid PR firm that specialized in environmental advocacy.
I have not read every word, but it is pretty clear that there is no new science here on the causes or magnitude of warming. In fact, if I had to describe the process used to prepare the first part of the report, it was to take past IPCC reports, strip out any wording indicating uncertainty, and then portray future forecasts using the IPCC mean forecasts as the lowest possible warming and whatever model they could find that spit out the highest forecast as the “worst case scenario.” Then, the rest of the report (about 90%) creates a variety of hypothesized disaster movie plots based on this worst case scenario.
You know that this is an advocacy document and not science right of the bat when they write this:
1. Global warming is unequivocal and primarily human-induced.
Global temperature has increased over the past 50 years. This observed increase is due primarily to humaninduced
emissions of heat-trapping gases.
Just look in wonder at the false religion-like certainty. Name three other scientific findings about horribly complex natural processes that have been studied in depth for only 20 years or so that one would use the word “unequivocal” for. OK, name even one.
If you can’t read the whole report, read the list of disasters on page 12. If I had shown this to you blind, and told you it from from a Paul Ehrlich the-world-will-end-in-a-decade book from the 1970s, you would probably have believed me.
This entire report assumes global warming to exist, assumes it is man-made, and assumes its future levels are as large or larger than those projected in the last IPCC report. The first four or five pages merely restate this finding with no new evidence. The majority of the report then takes this assumption, cranks it through various models, and generates scary potential scenarios about the US and it would be like if temperatures really rose 11F over the next century.