W. A. van Wijngaarden Department of Physics and Astronomy, York University, Canada W. Happer Department of Physics, Princeton University, USA October 8, 2025 A graphic that has turned out to be helpful for explaining why doubling greenhouse gases has only a tiny effect on thermal radiation to space is a variant of Fig. 4 of…
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9.26.2025
Open Letter to the United Nations Food and Agriculture Organization Concerning Sustainable Livestock Development
August 21, 2025 Bruno Telemans Yewon Sung FAO Headquarters Viale delle Terme di Caracalla 00153 Rome, Italy Dear Bruno Telemans, Yewon Sung, Thank you very much for your letter politely declining our request for a side event at the FAO Global Conference on Sustainable Livestock Transformation. We sent you a proposal for a parallel event,…
Dr. D. Weston Allen, MBBS, FRACGP Fellowship of the Royal Australian College of General Practitioners (FRACGP), full-time family physician at Kingscliff on the southern Gold Coast. Dr. Jan Breslow, M.D. Fredrick Henry Leonhardt Professor Rockefeller University; Head Laboratory of Biochemical Genetics and Metabolism; Senior Physician Rockefeller Hospital. Former President of the American Heart Association and…
Richard Lindzen Professor of Earth, Atmospheric, and Planetary Sciences, Emeritus Massachusetts Institute of Technology William Happer Professor of Physics, Emeritus, Princeton University Hon. Christopher Wright Secretary Department of Energy Federal Register :: Notice of Availability: A Critical Review of Impacts of Greenhouse Gas Emissions on the U.S. Climate Docket No. DOE-HQ-2025-0207 Re: Scientific Comment on…
8.26.2025
Lindzen-Happer Statement to National Academies of Sciences, Engineering, and Medicine
Richard Lindzen Professor of Earth, Atmospheric, and Planetary Sciences, Emeritus Massachusetts Institute of Technology William Happer Professor of Physics, Emeritus, Princeton University August 25, 2025 National Academies of Sciences, Engineering, and Medicine Committee on Anthropogenic Greenhouse Gases and US Climate: Evidence and Impacts 500 Fifth Street, NW Washington, DC 20001 Re: The Committee’s Charge to…
EXECUTIVE SUMMARY This report will examine the scientific basis for claims of harmful effects from climate change in Texas. Assertions have been made that many areas around the world are experiencing negative impacts from unusual and unprecedented warming driven by increasing human emissions of carbon dioxide (CO2). Texas is no different. Promotion of the need…
by Dr. Samuele Furfari Professor of Energy Geopolitics Like clockwork, we receive the annual Statistical Review of World Energy relevant to energy geopolitics every June. From 1954 until 2022, BP volunteered to compile this data. Initially, the review only covered oil, but was later expanded to include all fossil fuels, and finally to include data…
State and Regional Reports - Featured
EXECUTIVE SUMMARY This report will examine the scientific basis for claims of harmful climate-change-related effects in Arkansas. Like other areas around the world, claims have been made that Arkansas is experiencing negative impacts from unusual and unprecedented warming driven by increasing human emissions of carbon dioxide (CO2). A “solution” to this supposed problem is to…
Introduction A recent paper published in the Journal Nature by Dean et al. provides an interesting and compelling argument that a significant source of atmospheric CO2 has been underestimated by carbon budget models. The study, Old carbon routed from land to the atmosphere by global river systems looks at the origin of the CO2 released…
Photo: File:Joe Biden reviews his remarks before an event marking the one-year anniversary of the Inflation Reduction Act.jpg Richard Lindzen Professor of Earth, Atmospheric, and Planetary Sciences, Emeritus Massachusetts Institute of Technology William Happer Professor of Physics, Emeritus, Princeton University June 17, 2025 IRA CLIMATE SUBSIDIES SHOULD BE REPEALED BECAUSE PHYSICS DEMONSTRATES TRILLIONS OF DOLLARS…
Testimonies & Statements - Featured
6.13.2025
Physics Demonstrates That Increasing Greenhouse Gases Cannot Cause Dangerous Warming, Extreme Weather or Any Harm
Richard Lindzen Professor of Earth, Atmospheric, and Planetary Sciences, Emeritus Massachusetts Institute of Technology William Happer Professor of Physics, Emeritus, Princeton University PHYSICS DEMONSTRATES THAT INCREASING GREENHOUSE GASES CANNOT CAUSE DANGEROUS WARMING, EXTREME WEATHER OR ANY HARM More Carbon Dioxide Will Create More Food. Driving Greenhouse Gas Emissions to Net Zero and Eliminating Fossil Fuels…
Comment on the 5th National Climate Assessment 3rd Order Draft William Happer, Professor of Physics, Emeritus, Princeton University Richard Lindzen, Alfred P. Sloan Professor of Atmospheric Science Emeritus Massachusetts Institute of Technology CO2 Coalition Gregory Wrightstone, Executive Director Non-profit 501(c)(3) educational foundation January 27, 2023 The 5th National Climate Assessment 3rd Order Draft is Fatally Flawed Science…
Richard Lindzen Professor of Earth, Atmospheric, and Planetary Sciences, Emeritus Massachusetts Institute of Technology William Happer Professor of Physics, Emeritus, Princeton University Gold Standard Science May 25, 2025 The material below concerning how scientific knowledge is determined was drawn from the report Greenhouse Gases and Fossil Fuels Climate Science (4/28/25). II. SCIENTIFIC KNOWLEDGE IS DETERMINED…
By Roy W. Spencer, Ph.D. May 1, 2025 Cirrus clouds have been around forever. Cloud types were first named by English pharmacist Luke Howard in 1802 using Latin terms. Cirrus clouds refer to their hair-like appearance, but they can take on many shapes depending upon conditions such as humidity, the rate at which air is…
By Bruce M. Everett, Ph.D. May 8, 2025 Climate activists insist that (1) the narrative of catastrophic warming is rigorously formulated and beyond refutation and (2) oil and gas companies are global villains that should be brought to account for their sins. The recently published Nature article “Carbon Majors and the Scientific Case for Climate…
By W. A. van Wijngaarden and W. Happer January 2, 2025 Abstract We briefly review the dominant role of clouds in Earth’s climate. The earliest observational studies of heat transfer through Earth’s atmosphere, for example, those of John Leslie around 1800, showed that clouds have a large effect on radiative heat transfer from Earth’s surface…
Frits Byron Soepyan January 2025 Abstract: Various educational and medical institutions, as well as policymakers, have expressed concerns regarding the use of metered-dose inhalers to prevent or treat shortness of breath associated with asthma and chronic obstructive pulmonary disease (COPD), as these inhalers use hydrofluorocarbons (HFCs), which are greenhouse gases, as propellants. In response, “environmentally…
The paper’s Abstract explains that while the “radiative forcing” of each methane molecule is indeed 30 times larger than that of a carbon dioxide molecule, the increase in global methane is 300 times less than that of carbon dioxide. As a result, methane is only one tenth (30/300) as powerful in forcing as carbon dioxide, which adds about a degree Celsius to global warming as it doubles in the atmosphere. A methane doubling would provide only a tiny fraction of total greenhouse forcing, the paper says....
12.30.2024
Lightfoot and Ratzer, a Response: Why an Equation of State Alone Cannot Model Atmospheric Dynamics
By Kevin Kilty, Ph.D., P.E. CO2 Coalition Member Retired Mechanical Engineering faculty member, University of Wyoming Among the many attempts to demonstrate that CO2 has little to no effect on climate are several that purport to use an equation of state as their basis. A recent example by Lightfoot and Ratzer is entitled “The Sun…
12.12.2024
Human Contribution to Atmospheric CO2: How Human Emissions Are Restoring Vital Atmospheric CO2
Ferdinand Engelbeen, Renee Hannon, and David Burton December 2024 Since the beginning of the Industrial Revolution in the late 1700s, the average concentration of Earth’s atmospheric carbon dioxide (CO2) has increased by about 140 parts per million by volume (ppmv) to the current amount of about 420 ppmv. This is much higher than concentrations of…
Frits Byron Soepyan, William Happer, Gregory Wrightstone December 2024 Abstract: There is a growing concern in the medical industry regarding the emission of anesthetic gases, such as sevoflurane, nitrous oxide, isoflurane and desflurane, into the atmosphere, because these anesthetic gases are greenhouse gases. To determine if these concerns are sensible, we compiled the information regarding…
Richard Lindzen Professor of Earth, Atmospheric, and Planetary Sciences, Emeritus Massachusetts Institute of Technology William Happer Professor of Physics, Emeritus, Princeton University April 28, 2025 SUMMARY At the outset it is important to understand that carbon dioxide has two relevant properties, as a creator of food and oxygen, and as a greenhouse gas (GHG). As…
Submitted by: Gregory Wrightstone, Executive Director Frits Byron Soepyan, Research and Science Associate CO2 Coalition, Arlington, Virginia October 22, 2024 to the Wyoming Energy Authority We recommend against the expenditure of Wyoming tax revenues to study or implement the removal of carbon dioxide from the atmosphere or from the effluents of power plants and other…
CO2 Coalition Comment #2 on EPA Endangerment Finding