The “Social Cost of Carbon” Scam Revisited

As I wrote in 2015:

The “social cost of carbon”(SCC) is a computer-generated artifice that puts a dollar figure on the alleged environmental and economic damage caused by carbon dioxide emissions from burning fossil fuels. This number is supposed to allow bureaucrats to offset the alleged damage through regulation and taxes, i.e., it will increase the cost of electricity and gasoline. The computer models fail to take into account the benefits of carbon dioxide, such as making our crops more robust and more water efficient. Also, there is absolutely no physical evidence that our carbon dioxide emissions have any significant role in controlling global climate. (Read more on Wryheat)

Recent articles on SCC:

Why ‘Social Cost of Carbon’ Is Most Useless Number You’ve Never Heard Of

by Kevin Dayaratna

Dubbed by some as “the most important number you’ve never heard of,” the social cost of carbon is defined as the economic damages associated with a ton of carbon dioxide emissions across a particular time horizon. That metric, relied upon heavily by the Obama administration, has been used as the basis for regulatory policy in the energy sector of the economy. Three sets of statistical models are used to estimate the social cost of carbon. Social cost of carbon estimates are based on very questionable assumptions regarding the climate’s sensitivity to carbon dioxide emissions, naive projections reaching 300 years into the future, and ignorance of discount rate recommendations by the Office of Management and Budget regarding cost-benefit analysis. Our results tell the same story: Assumptions made by modelers can drastically change the purported estimates and thus beef up the damages as much as they want. (Read more)

Social Cost of Carbon May Be Social Benefit of Carbon, Economist Finds

by James Taylor (commenting on Dauaratna’s paper)

The Biden administration made headlines by imposing a “social cost of carbon” – to be factored into federal cost-benefit analysis – that is more than six times higher than the social cost of carbon determined by the Trump administration. However, economist and data scientist Kevin Dayaratna published an article documenting that the alleged social “cost” of carbon may actually be a social “benefit” of carbon. In an article for the Daily Signal, Dayaratna observes that any accurate assessment of the social cost of carbon must include social benefits as well as merely social harms. Importantly, Dayaratna observes that any sound cost/benefit assessment must take into account “positive agricultural feedback effects associated with carbon dioxide emissions.”

“In fact, we found that under very reasonable assumptions, those benefits can outweigh the costs, suggesting that the social cost of carbon can indeed be negative,” Dayaratna writes. “The policy implication of a negative social cost of carbon is that the government should not be taxing carbon dioxide emissions, but should be subsidizing it instead.” (Source)

See also: The Social Cost of Carbon Fantasy and

Biden’s Arbitrary Social Cost of Carbon: What You Need to Know

12 State Attorneys General Sue Biden Admin Over Its Climate Policies The lawsuit said Biden’s executive order enables regulatory agencies to place restrictions on nearly every aspect of Americans’ lives in order to cut back on greenhouse gas emissions.

For a tutorial on climate read:

A Review of the state of Climate Science

The past, present, and future state of Tucson’s creeks and rivers

From the Arizona Geological Survey:

‘The past, present, and future state of Tucson’s creeks and rivers’, a #StoryMap by the Watershed Management Group (a 501 (c) non-profit). The presentation includes some excellent historic images, diagrams, and interactive maps showing flow conditions, past and present, in Tucson drainages. Most illustrations have explanatory text. Just scroll down through the article.

Take a look.

An Arizona Rancher’s Request of President Biden

The following is a letter sent to President Biden by Southern Arizona Ranchers Jim and Sue Chilton, both friends of mine. Their ranch lies south of the small town of Arivaca and extends to the Mexican border which is “protected” by a four-strand barbed-wire fence.

Dear President Biden:
State and local Governments and, more importantly, families suffer from the flood of hard drugs smuggled into our country across the southern border.  Our motion-activated trail cameras document that more than one thousand smugglers and illegal entrants have crossed the international boundary in this rugged area through our ranch pastures south of Arivaca, Arizona.  We estimate that over half of the camouflaged Cartel mules recorded by our hidden cameras carry hard drugs into our country to poison our people.  Personally, we and our neighbors, as border Arizona ranchers, have had to live with the constant threat of this drug traffic for more than ten years since the Cartel took over this formerly unwalled, unguarded open pathway with no patrol road paralleling the border for their nefarious business.
Fisher Construction Company entered into a contract last year (2020) with the United States to construct a forty-two-mile barrier to halt unimpeded passage through this region’s border ranches and rural communities of illegal drugs, wanted criminals, sex traffic workers, and previously convicted and deported individuals. The contract was to close the open door between Nogales, Arizona and the Tohono O’Odham Reservation to the west. The work has been largely completed except for a five-mile gap.
Since Fisher Construction Company has purchased and located 100% of the steel bollards necessary to finish the work adjacent to the Border and since the cost of terminating the Fisher contract is estimated to be nearly equal to the cost of completing this work, it makes good sense to finish the portion now standing open. Clearly your initial decision to leave this work incomplete is welcomed by the drug runners, by their northern distribution network, and by their U.S. customers; it is not welcomed by law-abiding residents of this region who have been left with an illegal drug importation route running right through their ranches and delivering addiction to our fellow citizens.
We respectfully request you direct Homeland Security to honor the Fisher contract and complete the closure of this five-mile gap.
Jim and Sue Chilton
CC:  Homeland Security, Border Patrol, Arizona Congressional Delegation
See also:

Examining the Effect of the Border Wall on Private and Tribal Landowners

Chilton vs Center for Biological Diversity

From Rep. Andy Biggs: Arizona Congressman Shares What US-Mexico Border Is Like Now

Comments on President Biden’s Policies

On his first days as president, Joe Biden issued dozens of executive orders that profoundly change U.S. policy on energy and climate. Many of the policies kill American jobs, but the Biden administration promises that those jobs will be replaced by new “green” jobs. Question: shouldn’t the “green” jobs have been created before killing existing jobs? The stated rationale for these changes is that we are in a “climate crisis” that is an “existential threat to the planet.” However, there is no physical evidence supporting the claim of a “climate crisis” or that carbon dioxide emissions from burning fossil fuels are the principal cause of the “crisis.” There is, however, physical evidence that all climate changes we have experienced fall within natural variation. The only crisis is purely political.

“In our time, political speech and writing are largely the defense of the indefensible.” – George Orwell

Biden tells us to follow the science, but his policies demonstrate that he and his administration are ignorant of the science.

Read more at:

White House Brochures on Climate (There is no climate crisis)

[Wryheat note, the brochures linked to below were intended to be posted on the White House website, but since they are politically incorrect, the new administration has banned them. If the original links don’t work, click the “alternate link.”]

[UPDATE: Jan. 13, 2021:

 These briefs demonstrate that climate science has glaring deficiencies as a science when it is used to declare that carbon dioxide is causing dangerous global warming. These deficiencies are unacceptable to any student of the scientific method.

Legates and Ryan Maue, an author of one of the briefs, were promptly removed from their positions by OSTP director and Trump’s science advisor Kelvin Droegemeier was fired. They returned to their positions at NOAA. Applying the scientific method to climate science is not permitted in Washington, regardless of political party. It is clear that conformity conquers all.]

January 8th, 2021 by Roy W. Spencer, Ph. D. 

Late last year, several of us were asked by David Legates (White House Office of Science and Technology Policy) to write short, easily understandable brochures that supported the general view that there is no climate crisis or climate emergency, and pointing out the widespread misinformation being promoted by alarmists through the media.

Below are the resulting 9 brochures, and an introduction by David. Mine is entitled, “The Faith-Based Nature of Human Caused Global Warming”.  

Wryheat note: These brochures never made it to the White House website and have been removed from Dr. Spencer’s website as well. Fortunately, I saved the originals. Note that these brochures are no longer official White House publications.

Introduction(Dr. David Legates)

Alternate link: White House Brochures on Climate (There is no climate crisis) « Roy Spencer, PhD

The Sun Climate Connection(Drs. Michael Connolly, Ronan Connolly, Willie Soon)

Alternate link: WH brochure The-Sun-Climate-Connection

Systematic Problems in the Four National Assessments of Climate Change Impacts on the US(Dr. Patrick Michaels)

Alternate link: WH brochure Systematic-Problems-in-the-Four-National-Assessments-of-Climate-Change-Impacts-on-the-US

Record Temperatures in the United States(Dr. John Christy)

Alternate link: WH brochure record temperatures

Radiation Transfer(Dr. William Happer)

Alternate link: WH brochure Radiation-Transfer

Is There a Climate Emergency(Dr. Ross McKitrick)

Alternate link: WH brochure is there a climate emergency

Hurricanes and Climate Change(Dr. Ryan Maue)

Alternate link: WH brochure Hurricanes-and-Climate-Change

Climate, Climate Change, and the General Circulation(Dr. Anthony Lupo)

Alternate link: WH brochure Climate-Climate-Change-and-the-General-Circulation

Can Computer Models Predict Climate(Dr. Christopher Essex)

Alternate link: WH brochure Can-Computer-Models-Predict-Climate

The Faith-Based Nature of Human-Caused Global Warming(Dr. Roy Spencer)

Alternate link: WH brochure The-Faith-Based-Nature-of-Human-Caused-Global-Warming

See also my Wryheat post: A Review of the state of Climate Science


Glass recyclers have concerns over Tucson’s new plan

As I wrote in a previous article, Comments On Tucson City Council’s Plan On Recycling Glass, the City of Tucson plans to stop collecting glass in the recycle bins. Instead the City will provide sites around the city for residents to drop off glass. The glass will be ground to sand and used to fill sandbags or as an aggregate for construction projects. That plan has drawn the ire of glass recycling companies.

In response to that article, I recently received an email from Laura Hennemann, Vice President, Strategic Materials, the largest glass recycler in North America. The email contained three attachments, all letters to the Tucson City Council, that show the folly of the City plan.

Ms. Hennermann writes, “We are saddened to also learn the City’s glass will be pulverized and used as aggregate, ending the life of glass. Glass is 100% recyclable, endlessly. Glass does not belong in the ground or the landfill.” Read her full letter (click back arrow to return): View Fullscreen

The second letter is from Angus E. Crane, Executive Vice President, General Counsel, NAIMA (North American Insulation Manufacturers Association). His main point is that recycled glass is necessary to manufacture fiberglass insulation. Since 1992, when NAIMA started collecting recycled data, 61.8 billion pounds of recycled material have been diverted from the waste stream.

Read his letter: View Fullscreen 

The third letter is from Scott DeFife, President of the Glass Packaging Institute. His 4-page letter goes into detail on the flaws of Tucson’s plan. “The glass reuse plan is missing several key points in the underlying facts and analysis concerning removal of glass from curbside recycling, including its positive impact on carbon emissions, versus the proposed alternative, downcycling glass for sand substitute.” Read his letter: View Fullscreen

Tucson City Council members should rethink their plan. As I wrote before, I am skeptical that most residents will bother to find one of the city’s planned drop-off bins. I think that under the proposed plan, most glass will wind up in the landfill.

Bjorn Lomborg on how to deal with climate change

Dr. Bjorn Lomborg is president of the Copenhagen Consensus Center, visiting fellow at the Hoover Institution, Stanford University, and visiting professor at Copenhagen Business School. The Copenhagen Consensus Center is a think-tank that researches the smartest ways to do good.

His new paper: Welfare in the 21st century: Increasing development, reducing inequality, the impact of climate change, and the cost of climate policies


Climate change is real and its impacts are mostly negative, but common portrayals of devastation are unfounded. Scenarios set out under the UN Climate Panel (IPCC) show human welfare will likely increase to 450% of today’s welfare over the 21st century. Climate damages will reduce this welfare increase to 434%.

Arguments for devastation typically claim that extreme weather (like droughts, floods, wildfires, and hurricanes) is already worsening because of climate change. This is mostly misleading and inconsistent with the IPCC literature. For instance, the IPCC finds no trend for global hurricane frequency and has low confidence in attribution of changes to human activity, while the US has not seen an increase in landfalling hurricanes since 1900. Global death risk from extreme weather has declined 99% over 100 years and global costs have declined 26% over the last 28 years.

Arguments for devastation typically ignore adaptation, which will reduce vulnerability dramatically. While climate research suggests that fewer but stronger future hurricanes will increase damages, this effect will be countered by richer and more resilient societies. Global cost of hurricanes will likely decline from 0.04% of GDP today to 0.02% in 2100.

Climate-economic research shows that the total cost from untreated climate change is negative but moderate, likely equivalent to a 3.6% reduction in total GDP.

Climate policies also have costs that often vastly outweigh their climate benefits. The Paris Agreement, if fully implemented, will cost $819–$1,890 billion per year in 2030, yet will reduce emissions by just 1% of what is needed to limit average global temperature rise to 1.5°C. Each dollar spent on Paris will likely produce climate benefits worth 11¢.

Long-term impacts of climate policy can cost even more. The IPCC’s two best future scenarios are the “sustainable” SSP1 and the “fossil-fuel driven” SSP5. Current climate-focused attitudes suggest we aim for the “sustainable” world, but the higher economic growth in SSP5 actually leads to much greater welfare for humanity. After adjusting for climate damages, SSP5 will on average leave grandchildren of today’s poor $48,000 better off every year. It will reduce poverty by 26 million each year until 2050, inequality will be lower, and more than 80 million premature deaths will be avoided.

Using carbon taxes, an optimal realistic climate policy can aggressively reduce emissions and reduce the global temperature increase from 4.1°C in 2100 to 3.75°C. This will cost $18 trillion, but deliver climate benefits worth twice that. The popular 2°C target, in contrast, is unrealistic and would leave the world more than $250 trillion worse off. *

The most effective climate policy is increasing investment in green R&D to make future decarbonization much cheaper. This can deliver $11 of climate benefits for each dollar spent.

More effective climate policies can help the world do better. The current climate discourse leads to wasteful climate policies, diverting attention and funds from more effective ways to improve the world.

This article will outline how to establish a rational climate policy in the context of many other, competing global issues. Read full paper: 

*Wryheat comment: I disagree with Lomborg’s stance on “carbon taxes” because where they have been imposed show that they fail to deliver advertised benefits, see:

Carbon Tax Failures – Lessons from Australia and Germany

See also:

A Review of the state of Climate Science

The Fortuitous Link Between CO2 Emissions and Economic Growth (video)

Is Rising Atmospheric CO2 Causing Dangerous Global Warming? (video)

Many people are concerned about the potential impacts of rising levels of atmospheric CO2. For years they have been bombarded with claims that unless its concentration is slowed or even reduced, dangerous global warming will ensue, producing all sorts of undesirable consequences with little to no positive effects. Watch this video to lean why this scenario is unlikely to occur and why CO2 is not the all-important driver of temperature that climate alarmists make it out to be.

Hurricane strength and frequency just part of natural variation

The several recent hurricanes making landfall in the southeastern U.S. have spawned claims that they are the result of global warming. However, real data show that these hurricanes are consistent with natural variation. The following graphs were constructed by meteorologist Dr. Ryan N. Maue, who has recently been appointed as chief scientist at NOAA, the National Oceanic and Atmospheric Administration. See his website:

Hurricane Frequency

On the graph below, the upper line shows all hurricanes with wind speeds of greater than 64 knots. The bottom line show major hurricanes with wind speeds of greater than 96 knots. As you can see, overall, there has been no increase in frequency.

Hurricane Strength

Hurricane strength is measured as “accumulated cyclone energy” ACE. In the graph below, the upper line is global, the bottom line is for the northern hemisphere.


Dr. Maue notes:

“Tropical cyclone accumulated cyclone energy (ACE) has exhibited strikingly large global interannual variability during the past 40-years. In the pentad since 2006, Northern Hemisphere and global tropical cyclone ACE has decreased dramatically to the lowest levels since the late 1970s. Additionally, the frequency of tropical cyclones has reached a historical low. Here evidence is presented demonstrating that considerable variability in tropical cyclone ACE is associated with the evolution of the character of observed large-scale climate mechanisms including the El Nino Southern Oscillation and Pacific Decadal Oscillation. In contrast to record quiet North Pacific tropical cyclone activity in 2010, the North Atlantic basin remained very active by contributing almost one-third of the overall calendar year global ACE.”

Hurricane landfalls:

The graph below shows the number of land-falling hurricanes since 1970. The dark bars are category 1&2 hurricanes; the grey bars are hurricanes of category 3 and above.


See also:

Why Hurricanes Can’t Be Blamed On Global Warming

A Review of the state of Climate Science    See why reducing carbon dioxide emissions from burning fossil fuels will have no effect on global temperature.



What Global Surface Temperature is Ideal for Human Habitation?

The fake fear of climate change is the current boogeyman of our age. Some say we must eliminate some or all of our carbon dioxide (CO2) emissions or the Earth will become uninhabitable. They say we must limit global temperature to a maximum of 2°C. In articles referenced below I show why that is nonsense.

So, what is an ideal temperature? A new study led by Washington State University and published in the Journal of Astrobiology proposes an answer. This study examines exoplanets in the universe. The study is titled: In Search for a Planet Better than Earth: Top Contenders for a Superhabitable World. (Link to full study)

Paper Abstract:

The fact that Earth is teeming with life makes it appear odd to ask whether there could be other planets in our galaxy that may be even more suitable for life. Neglecting this possible class of “superhabitable” planets, however, could be considered anthropocentric and geocentric biases. Most important from the perspective of an observer searching for extrasolar life is that such a search might be executed most effectively with a focus on superhabitable planets instead of Earth-like planets. We argue that there could be regions of astrophysical parameter space of star-planet systems that could allow for planets to be even better for life than our Earth. We aim to identify those parameters and their optimal ranges, some of which are astrophysically motivated, whereas others are based on the varying habitability of the natural history of our planet. Some of these conditions are far from being observationally testable on planets outside the solar system. Still, we can distill a short list of 24 top contenders among the >4000 exoplanets known today that could be candidates for a superhabitable planet. In fact, we argue that, with regard to the search for extrasolar life, potentially superhabitable planets may deserve higher priority for follow-up observations than most Earth-like planets.

Bottom line: The best habitable planets will have a mean surface temperature about 5°C higher than on Earth.

My previous articles on the subject show why reducing CO2 emissions will be a multi-trillion dollar, futile exercise that will send us back to the dark ages :

Who Is Afraid Of Two Degrees Of Warming?

During the past 10,000 years (the Holocene), Earth experienced several cycles of warming and cooling which exceeded the mythical two degree limit. Civilizations thrived during the warm periods and had a harder time during cold periods.

Estimates Of Global Warming Reduction By Reducing CO2 Emissions

The latest talking point of progressive politicians, pundits, and activists is that America cannot afford not to spend trillions of dollars to “solve the climate crisis” because global warming is an existential threat. Even a complete elimination of U.S. greenhouse gas emissions would avert only 0.083°C to 0.173°C by year 2100. All climate policies by the US, China, the EU and the rest of the world, implemented from the early 2000s to 2030 and sustained through the century will likely reduce global temperature rise about 0.17°C in 2100.

A doubling of current atmospheric carbon dioxide will produce global warming of just over one degree Celsius. Since carbon dioxide is plant food, such a doubling would make the planet greener and food farming more productive.

See also:

A Review of the state of Climate Science