This is over two years old. Have YOU read the entire report? It's 156 pages long. Or did you just read the summary, with selected highlights?
The aim of the report is to refute that only a handful of scientists - mostly in the pocket of oil companies - still dispute that global warming is happening, and that it's caused by human activities. To this end, Inhofe's aides scoured the internet for quotes from skeptical "scientists".
I put this word in quotes because not all the "over 400 prominent scientists" are truly scientists. As the report itself states, the list includes economists and engineers. These may be smart people, but a smart person without expertise in climate science is still a person without expertise in climate science.
Just one example:
"The effect of solar winds on cosmic radiation has just recently been established and, furthermore, there seems to be a good correlation between cloudiness and variations in the intensity of cosmic radiation. Here we have a mechanism which is a far better explanation to variations in global climate than the attempts by IPCC to blame it all on anthropogenic input of greenhouse gases." –Boris Winterhalter (a marine biologist)
This theory is decades old and has been examined closely. The underlying correlations have been shown to be spurious, and there is no physical mechanism shown to connect cosmic rays to climate.