#research-piece > *In this note, I just really wanted to understand why people even deny climate change in the first place. Especially, since the science is generally so clear. Hope it helps you gain some clarity on the same too in case this was something that interests you!* ![[climate-change-meme.png]] ## Introduction The scientific consensus on climate change is overwhelming. [More than 99% of peer-reviewed climate science papers affirm that human activity is warming our planet.](https://iopscience.iop.org/article/10.1088/1748-9326/ac2966) Yet despite this near-unanimous scientific agreement, a significant portion of the population remains sceptical of climate change or its human causes. Understanding why requires looking beyond simple disagreement about facts. Climate denial is rooted in how our minds process complexity, the psychological appeal of certain arguments, and the deliberate communication strategies deployed by sceptics. This article explores the cognitive mechanisms that make denial appealing, the most common arguments used by prominent sceptics, and how these arguments have shaped real-world policy decisions. ## The Overwhelming Scientific Consensus Before examining denial, it's important to establish what scientists actually agree on. [A peer-reviewed study](https://iopscience.iop.org/article/10.1088/1748-9326/ac2966) examining 88,125 climate-related papers published since 2012 found that the scientific consensus on human-caused climate change exceeds 99% in the peer-reviewed scientific literature. The researchers analysed a random sample of 3,000 abstracts and identified an additional 1,000 papers using predictive keywords designed to locate sceptical papers. They found only 32 papers expressing scepticism out of more than 3,000 examined, representing less than 0.035% of the literature. This consensus is comparable to other well-established scientific theories like plate tectonics and evolution. The Intergovernmental Panel on Climate Change has confirmed that "the influence of human activity on the warming of the climate system has evolved from theory to established fact." The [evidence supporting this consensus](https://science.nasa.gov/climate-change/evidence/) is concrete. Multiple lines of data show that climate change is occurring and that humans are responsible. The current warming trend is unprecedented, with warming happening roughly 10 times faster than post-ice age warming rates since the mid-20th century. The planet's average surface temperature has risen about 2°F (1°C) since the late 19th century. Greenland has lost approximately 279 billion tons of ice yearly between 1993 and 2019, whilst Antarctica lost about 148 billion tons yearly. Historically, sea levels have risen roughly 8 inches per century since 1880, but the current rate is accelerating—recent measurements show the pace is now nearly double that historical average, at approximately 18 inches per century. Arctic ice extent and thickness have both declined rapidly. These changes correlate directly with increased atmospheric CO₂ from human activities. ## The Psychology of Denial: Black-and-White Thinking Understanding why denial persists requires examining how our minds work. [Research identifies black-and-white thinking (also called dichotomous or all-or-none thinking) as a primary cognitive error that makes people susceptible to climate denial.](https://theconversation.com/the-thinking-error-that-makes-people-susceptible-to-climate-change-denial-204607) This mental shortcut simplifies complex realities into binary categories, which requires less cognitive effort than processing nuance. The problem is that climate systems are complicated, and binary thinking is poorly suited to understanding them. Black-and-white thinking operates in three specific ways when applied to climate: **First, rejecting consensus through false standards.** Deniers often dismiss the overwhelming scientific consensus by demanding 100% agreement. Since one contrarian scientist exists, they argue no consensus actually exists. This ignores the basic reality that scientific consensus never means absolute unanimity; it means the overwhelming majority of experts agree based on evidence. **Second, mistaking short-term fluctuations for long-term trends.** Deniers point to cold snaps or temporary cooling as disproof of warming. This is akin to "mistaking a bad month for Apple stock for proof that Apple isn't a good long-term investment." Climate refers to long-term patterns spanning decades and centuries, whereas weather describes short-term conditions. **Third, ignoring the grey area between extremes.** Deniers acknowledge that other climate factors exist, such as sunspots or volcanic eruptions. But instead of recognising that greenhouse gases are the most influential factor humans can control, they conclude that since greenhouse gases aren't all-important, they're unimportant. Reality exists in the grey area between these extremes. This cognitive error, combined with disinformation campaigns from fossil fuel interests, creates a powerful barrier to climate action. ## Why Some Americans Attribute Change to Natural Cycles [When Pew Research Centre researchers interviewed Americans sceptical of climate change](https://www.pewresearch.org/science/2023/08/09/why-some-americans-do-not-see-urgency-on-climate-change/), several patterns emerged in how these people explained warming. Rather than accepting human causation, many attributed it to natural planetary cycles. One respondent noted: "we go through these peaks and valleys of climate. We have since the Earth was created." This perspective reflects several underlying beliefs. Many sceptics believe humans play only a minor role in climate processes they view as largely beyond human control. Personal experience also shapes perception; some cited their own observations, claiming temperatures in their lifetimes hadn't noticeably changed, supporting their belief in natural cycles rather than human-caused warming. Interestingly, messaging perceived as alarmist backfired with this group. When presented with what they viewed as catastrophic claims about climate change, participants actually increased their scepticism rather than accepting the message. Exaggerated claims made them doubt the entire premise, causing them to retreat toward simpler natural-cycle explanations. Additionally, distrust of information sources played a role. Sceptics distrusted media and some scientists, whom they suspected of having political or financial agendas, and gravitated toward explanations they felt weren't promoted by institutions they distrusted. >[!info] >[Climate denial is not unique to Americans.](https://www.ipsos.com/en/36-percent-worlds-population-still-dispute-human-origins-climate-change) Global surveys show 36% of the world's population disputes the human origins of climate change. Whilst lifestyle changes do play a role in resistance, denial stems from multiple causes: cognitive patterns like black-and-white thinking, institutional distrust, and genuine disagreements about scientific models - as seen in the Dyson and Happer cases. The pattern is global, but the underlying drivers vary. ## The Prominent Sceptical Voices: Dyson and Happer Prominent sceptics have articulated detailed challenges to climate science consensus, even though their arguments don't reflect mainstream scientific opinion. Freeman Dyson, a renowned Princeton physicist, has been influential in expressing doubt about climate models and their implications. [Dyson argues that climate models are fundamentally unreliable](https://e360.yale.edu/features/freeman_dyson_takes_on_the_climate_establishment). He contends that clouds dominate the climate system, and "you cannot model them in any realistic way." He claims models use "fudge factors" rather than realistic representations of cloudiness. He also argues that climate scientists overlook the biological dimension of the carbon cycle, particularly how plants respond to increased CO₂. According to Dyson, vegetation plays a far larger role than models acknowledge, perhaps "more than half of the real system." Regarding warming's impacts, Dyson disputes that it causes net harm. He notes that "five times as many people die of cold in winters as die of heat in summer," and emphasises that warming concentrates in cold regions and seasons rather than uniformly across the planet. He also suggests that researchers have financial incentives to emphasise problems, arguing that "the whole livelihood of all these people depends on people being scared." Rather than reducing emissions, Dyson proposes that genetic engineering could create plants absorbing excess CO₂ if needed. [William Happer represents another prominent sceptical voice](https://skepticalscience.com/William_Happer_arg.htm). The online website Skeptical Science documents that Happer has promoted 23 distinct climate myths. His arguments include claims that "the Medieval Warm Period was warmer than today," that "the hockey stick is broken" (referring to a graph of historical temperatures), that "CO₂ is plant food," that models are unreliable, that CO₂ limits will harm the economy, and that climate impacts "aren't bad" and "aren't urgent." Whilst these arguments sound intuitive, mainstream climate science systematically rebuts each one with evidence showing that recent global temperatures are unprecedented and that negative impacts on agriculture, health, and the environment far outweigh any benefits from increased CO₂. ## The Paris Agreement and Misrepresentation Climate denial became especially prominent in American political discourse around the Paris Agreement[^1], an international accord designed to limit global warming to well below 2°C. The Trump administration's withdrawal from this agreement provides a case study in how misrepresentation shapes climate policy. [MIT research examined what the Paris Agreement would actually achieve. The findings are sobering but instructive](https://news.mit.edu/2016/how-much-difference-will-paris-agreement-make-0422). Even if countries extend their current pledges through the century, global surface temperature will rise between 2.7 and 3.6°C above preindustrial levels by 2100, exceeding the 2°C target by roughly 1°C. The agreement produces minimal benefit in the short term, with temperature reductions of only about 0.1°C by 2050. Lead researcher Erwan Monier characterised it as progress but insufficient: "It puts us on the right path to keep warming under 3°C, but even under the same level of commitment of the Paris agreement after 2030, our study indicates a 95 percent probability that the world will warm by more than 2°C by 2100." Trump misrepresented these findings. He claimed the agreement would result in outcomes far worse than what MIT research actually predicted. Trump also argued that the US had pledged the largest amount to the Green Climate Fund, which whilst true in absolute terms, ignores per capita contributions. He promised that the US would achieve the "cleanest air" and "cleanest water" under his policies, claims not supported by environmental performance data. The Trump administration's official justification for withdrawal claimed "an unfair burden imposed on American workers, businesses, and taxpayers by U.S. pledges made under the Agreement." They highlighted that the US had reduced net greenhouse gas emissions by 13% from 2005 to 2017 despite 19% economic growth, and noted that citizens had access to cleaner sources of energy. Conservative economic analyses amplified these concerns. [The Heritage Foundation published a report](https://www.heritage.org/environment/report/consequences-paris-protocol-devastating-economic-costs-essentially-zero) claiming that Paris Protocol policies would result in an annual average loss of nearly 400,000 jobs by 2035, total income loss of more than $20,000 for a family of four, and an aggregate GDP loss of over $2.5 trillion. The report projected electricity cost increases between 13% and 20%, particular harm to manufacturing, and disproportionate impacts on the poorest Americans. Crucially, the report asserted these substantial economic costs would yield negligible climate benefits, claiming US emissions reductions would produce "less than two-tenths of a degree Celsius reduction in global temperatures." ## Recurring Inaccuracies in Climate Arguments Beyond structured arguments from figures like Dyson and Happer, climate scepticism relies on specific factual claims that consistently prove inaccurate. [Trump has been a particular source of such misinformation](https://www.factcheck.org/2024/09/trump-clings-to-inaccurate-climate-change-talking-points/). Trump drastically underestimates ocean level rises, claiming "the oceans will rise an eighth of an inch in 355 years," when they're already rising over one-eighth inch annually. He conflates climate with weather, stating "It's weather" to dismiss warming concerns, despite climate referring to long-term patterns whilst weather describes short-term conditions. Trump falsely claims scientists stopped using the term "global warming" because some regions cool. In reality, the term appears in over 40,000 scientific papers annually. He suggests 1920s scientists predicted planetary freezing to undermine current warming science, though no scientific consensus supported this claim. He distorts an IPCC report about limiting warming to 1.5°C, falsely claiming scientists predicted "we have 12 years to live." He claims wind energy is "the most expensive energy" when onshore wind actually costs similarly to or less than natural gas or coal. He states that wind turbines need replacement every nine years, but they typically last 20 to 30 years. These inaccuracies persist despite repeated fact-checking, suggesting they serve a broader rhetorical purpose beyond accurate communication. ## Conclusion Climate denial persists not because the scientific evidence is ambiguous—it isn't. The consensus is overwhelming, and multiple independent datasets converge on the same conclusion: human activity is warming the planet. Instead, denial persists because of how humans naturally process complex information, the psychological appeal of simplifying narratives, and the deliberate deployment of misrepresentation by prominent voices. Understanding these mechanisms is crucial because it clarifies what won't work as a response. Presenting more data to people engaging in black-and-white thinking often fails because they process it through dichotomous frameworks. Messaging that invokes catastrophe backfires by increasing scepticism rather than acceptance. What does work is recognising that denial isn't irrational in the psychological sense—it reflects normal cognitive patterns applied to abnormally complex systems, combined with legitimate distrust of institutions that have sometimes misled the public. The challenge ahead isn't primarily scientific. It's the harder work of addressing how humans actually process information[^2], recognising the legitimate concerns embedded within sceptical arguments (even when those arguments reach incorrect conclusions), and rebuilding the institutional trust necessary for collective action on climate change. [^1]: See [[The Paris Agreement and Nationally Determined Contributions]] [^2]: An [analysis by First Draft (2021)](https://firstdraftnews.org/articles/climate-change-misinformation-conspiracy-memes/) dived into how memes are a core component of the mis-information that spreads online when it comes to climate change.