The leftist website Daily Kos published an article yesterday claiming climate alarmists are more scientifically credible when they make things up out of thin air – while presenting no supporting scientific facts or evidence – than when climate realists cite numerous datasets and peer-reviewed studies that support their claims. Making stuff up out of thin air is acceptable, honorable, and compelling, according to DailyKos, if you do it in the name of climate alarmism.

Earlier this week, we published an article here at Climate Realism calling attention to dubious claims made by prominent climate alarmist Katharine Hayhoe in her public presentations to Christian groups. We specifically noted that Hayhoe uses an apparently self-made chart in her presentations that shows global temperatures steadily and monotonously declining, with almost no variations, for nearly 6,000 years. Hayhoe’s chart, reproduced below, then shows, at the end of the 6,000 years of steady cooling, an enormous temperature spike in the 20th century that completely overwhelms the previous 6,000 years of steady cooling.

Our Climate Realism article then showed what the United Nations Intergovernmental Panel on Climate Change (IPCC) itself presented in its very first climate report – published in 1990 and confirmed by multiple studies since (see, for example, pg. 14 here) – in which scientists, the IPCC, and multiple datasets and peer-reviewed studies agreed that scientific evidence shows temperatures have varied frequently and considerably throughout the past 6,000 years. The IPCC chart, reproduced below, also showed temperatures currently remain cooler than was the case during most of the past 6,000 years.


As we pointed out in the Climate Realism article, Hayhoe provides no sources or supporting data to support her claim that the IPCC, established science, and multiple supporting studies are all wrong. She merely shows her own chart in public presentations and then uses her highly suspicious chart to support her claim that humans are creating an unprecedented and existential climate crisis.

DailyKos yesterday published an article childishly attacking the Climate Realism article. The DailyKos article never cited any scientific evidence, data, or studies to support Hayhoe’s chart. Instead, the article claimed, “Not be outdumb’d, Heartland’s James Taylor thought it would be clever to contrast a chart Dr. Hayhoe uses with one from the very first IPCC report, as though a graph from 1990 is somehow more accurate than something produced with the benefit of an additional thirty years of research.” Of course, the only presented “thirty years of research” is Katharine Hayhoe’s self-serving, self-presented chart for which she provides no documentary evidence.

So, the alarmist argument is that if a climate alarmist simply makes up a chart or an argument out of thin air, that chart or argument is more credible than factually documented, evidentiary-based science that has been well established and that has remained in effect for many, many years. By that logic:

  • Climate alarmists can – and likely will – claim without any supporting evidence that the Sun revolves around the Earth, because Copernicus’ theory is “old science” demonstrated more than 400 years ago.
  • Climate alarmists can – and likely will – claim without any supporting evidence that the Earth is flat, because it has been 500 years since Magellan circumnavigated the Earth.
  • Climate alarmists can – and likely will – claim without any supporting evidence that the Moon landing never happened, because 50 years have passed since scientists and astronauts accomplished and documented the feat.

Sorry, Katharine Hayhoe and DailyKos, making stuff up out of thin air is not more scientifically compelling than long-established scientific knowledge that is well-sourced, well-cited, and confirmed multiple times since with additional scientific data and studies.

James Taylor is Director of the Arthur B. Robinson Center for Climate and Environmental Policy at The Heartland Institute. Taylor is the former managing editor (2001-2014) of Environment & Climate News, a national monthly publication devoted to sound science and free-market environmentalism.


  1. Making stuff up, discarding inconvenient facts, re-writing history, and lack of common sense are traits permeating the Left. This is encapsulated in one of the Left’s better known motto’s – “Win by any means necessary.”

  2. It is hard to say whether this warming trend is unusual or not, as various different studies suggest different things. There was the Greenland Ice Project, which showed the cyclicality of the Holocene Interglacial. However, there are various studies which suggest that this trend is unusual and surpasses previous ones during the Holocene Interglacial. Marcott et. al 2013, Moberg et. al 2005, Esper et. al 2002, Huang et. al 2000, Derlemans 2000, Hegerl et. al 2006, Jones et. al 2001.

  3. Exactly, ScienceABC123. I believe the root of the evil is found at NASA/NOAA where they go back and “revise” historical temperature data by inserting new temperature stations and applying algorithms on older data from existing. If you narrow your focus on the U.S. Historical Climatology Network ( where the historical measurements are preserved, the general trend is temperature decrease over the past 120 years. Plus there is no change is the *rate* of sea level increase since the Civil War ( Just like they instill fear in the populace with their climate lies, so do they poison race relations with their distorted crime statistics. Equalizing across the number of police encounters, there is actually a 25% greater chance that a white person will be killed by a cop (4 per 100,000 for whites vs. 3 per 100,000 for blacks). As you said, “By any means necessary.” Even if it means overturning the game board, which is what they are attempting to do now.

  4. […] Daily Kos: when greeniacs make up lies about “cimate change” – to “counter” well-researched and annotated truth from patriots – it’s th have the moral high ground; lying to achieve totalitarianism and poverty is really cool:… […]

  5. As Tony Heller has pointed out numerous times, one major key for CO2 alarmists in presenting temperature data is to decide where in time to start their graph. Hayhoe starts hers at the *end* of the Holocene warming period in order to enhance the impression of warming. Then, she smoothes out the Roman warming period, the medieval warming period, and the ‘little ice age’ (possibly through dodgy normalization techniques; but frankly I think she just fudged the graph because she doesn’t seem that smart and expects her audiences are totally credulous). And she somehow shifts out the 400-800 year lag (another reason I suspect she is just creating the charts) of CO2 to warming to enhance the story of CO2 levels driving the rise/fall, rather than being an effect. Liars figure. I’m a hockey fan, too.


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