Freeman Dyson is not a scientist?
If you'd bother to do your research...
Freeman Dyson is a crotchety old (84 yo) physicist and mathematician who has only questioned some of the marginal issues about global warming.
He doesn't outright deny global warming like others, but wrapped some general questions into a good personal PR campaign to go on the cocktail circuit.
That's why the "studies" you cite w/ him are only commencement addresses. He's never published any research on the issue, just raised some questions.
& he's only questioned the utility of the proposed solutions to deal w/ the problem -- not that it isn't a problem. He just puts it in provocative ways for some publicity.
I'm not saying the warming doesn't cause problems, obviously it does. Obviously we should be trying to understand it. I'm saying that the problems are being grossly exaggerated. They take away money and attention from other problems that are much more urgent and important. Poverty, infectious diseases, public education and public health. Not to mention the preservation of living creatures on land and in the oceans
This is a process not unlike the anti-science Christian Creationists who take spats over minor details in evolution theory & use them to claim the whole theory is wrong, or try to confuse things by saying "it's only a
theory" (in common use of the word) rather than an accepted principle of science (scientific use of the term). Even gravity is a "theory" but no one ever shoots off into space.
Dyson likes to think of himself as a "heretic" for taking outlandish views; he also thinks the Ph.D. system is a terrible system & should be dismantled. But in real scientific circles looking at the issues, he'd have nothing to offer cause he only speaks in generalities and provocative bromides.
Another reason he's liked so well by the fantasy experts is that he's always been interested in theorizing about science fiction concepts, giving that subculture some credence -- sci fi & fantasy, the balm of pimply faced dweebs who never had a date in high school.
A few cocktail circuit addresses aren't a pimple on the ass of the accepted wisdom of real scientific agencies doing the actual reasearch & studies, like in the
National Academy of Sciences and
the American Association for the Advancement of Science, no matter how many maids carrying the water of Exxon will try to puff up even the most meager evidence to justify driving their SUVs around the mall parking lot.
Not, of course, that any of this will do any good... the partisan ideologues poh-pooh the Global Warming concerns because they think all environmentalism is simply a secret plan to foster a worldwide socialist dictatorship w/ Al Gore as king *snicker*
but the brilliant "skeptics of Global Warming" can go ahead & stand w/ the Flat Earth Society, the tobacco scientists, the Creationists --- birds of a feather