A long but excellent piece well worth the full read.
"Now, thanks largely to climate science, I have changed my mind. It turns out bad ideas can persist in science for decades, and surrounded by myrmidons of furious defenders they can turn into intolerant dogmas."
"The theory that dietary fat causes obesity and heart disease, based on a couple of terrible studies in the 1950s, became unchallenged orthodoxy and is only now fading slowly.
What these two ideas have in common is that they had political support, which enabled them to monopolise debate.
[...] Nina Teicholz’s book The Big Fat Surprise shows in devastating detail how opponents of Ancel Keys’s dietary fat hypothesis were starved of grants and frozen out of the debate by an intolerant consensus backed by vested interests, echoed and amplified by a docile press."
"Since then, however, inch by inch, the huge green pressure groups have grown fat on a diet of constant but ever-changing alarm about the future. That these alarms-over population growth, pesticides, rain forests, acid rain, ozone holes, sperm counts, genetically modified crops-have often proved wildly exaggerated does not matter: the organisations that did the most exaggeration trousered the most money. In the case of climate, the alarm is always in the distant future, so can never be debunked.
These huge green multinationals, with budgets in the hundreds of millions of dollars, have now systematically infiltrated science, as well as industry and media"
"The IPCC actually admits the possibility of lukewarming within its consensus, because it gives a range of possible future temperatures: it thinks the world will be between about 1.5 and four degrees warmer on average by the end of the century. That’s a huge range, from marginally beneficial to terrifyingly harmful, so it is hardly a consensus of danger, and if you look at the 'probability density functions' of climate sensitivity, they always cluster towards the lower end."
"Following what the psychologist Philip Tetlock called the “psychology of taboo”, there has been a systematic and thorough campaign to rule out the middle ground as heretical: not just wrong, but mistaken, immoral and beyond the pale. That’s what the word denier with its deliberate connotations of Holocaust denial is intended to do. For reasons I do not fully understand, journalists have been shamefully happy to go along with this fundamentally religious project."
"Barack Obama says that 97 per cent of scientists agree that climate change is “real, man-made and dangerous”. That’s just a lie (or a very ignorant remark): as I point out above, there is no consensus that it’s dangerous.
So where’s the outrage from scientists at this presidential distortion? It’s worse than that, actually. The 97 per cent figure is derived from two pieces of pseudoscience that would have embarrassed a homeopath. The first was a poll that found that 97 per cent of just seventy-nine scientists thought climate change was man-made-not that it was dangerous. A more recent poll of 1854 members of the American Meteorological Society found the true number is 52 per cent.
The second source of the 97 per cent number was a survey of scientific papers, which has now been comprehensively demolished by Professor Richard Tol of Sussex University"
"The Cook paper is one of many scandals and blunders in climate science." Too long a list for pull quotes.
"There is, however, one good thing that has happened to science as a result of the climate debate: the democratisation of science by sceptic bloggers. [...] Papers that had passed formal peer review and been published in journals have nonetheless been torn apart in minutes on the blogs. There was the time Steven McIntyre found that an Antarctic temperature trend arose “entirely from the impact of splicing the two data sets together”. Or when Willis Eschenbach showed a published chart had “cut the modern end of the ice core carbon dioxide record short, right at the time when carbon dioxide started to rise again” about 8000 years ago, thus omitting the startling but inconvenient fact that carbon dioxide levels rose while temperatures fell over the following millennia."
"And it’s not working anyway. Despite avalanches of money being spent on research to find evidence of rapid man-made warming, despite even more spent on propaganda and marketing and subsidising renewable energy, the public remains unconvinced. The most recent polling data from Gallup shows the number of Americans who worry “a great deal” about climate change is down slightly on thirty years ago,"
http://www.rationaloptimist.com/blog/what-the-climate-wars-did-to-science.aspx