In progress
Decades of climate research and data have yielded expanded understanding of how greenhouse gases affect the climate. This fast-track study will review the latest scientific evidence on whether greenhouse gas emissions are reasonably anticipated to endanger public health and welfare in the U.S. The committee’s report will be completed and publicly released in September.
- National Academies Publish New Report Reviewing Evidence for Greenhouse Gas Emissions and U.S. Climate, Health, and Welfare Sep 17, 2025 News Release
- National Academies Launch Fast-Track Review of Latest Evidence for Whether Greenhouse Gas Emissions Endanger Public Health and Welfare Aug 7, 2025 News Release
Featured publication
Consensus
·2025
The scientific community has been studying the question of how human-caused emissions of greenhouse gases are affecting the climate for well over a century. Much is known today, drawing on decades of direct observations of the Earth system and detailed research. This report summarizes the latest evi...
View details
Description
This fast-track study will review evidence for whether anthropogenic emissions of greenhouse gases to the atmosphere are reasonably anticipated to endanger public health and welfare in the United States. The study will focus on updates since the Environmental Protection Agency finalized the Endangerment Finding in 2009, examine how current understanding compares to the 2009 Endangerment Finding, and provide explanation for any changes. The study will develop conclusions that describe supporting evidence, the level of confidence, and areas of disagreement or unknowns.
Contributors
Committee
Chair
Member
Member
Member
Member
Member
Member
Member
Member
Member
Member
Member
Member
Member
Member
Member
Conflict of Interest Disclosure
Arthur Lee: Disclosure of Unavoidable Conflict(s) of Interest
The conflict of interest policy of the National Academies of Sciences, Engineering, and Medicine (http://www.nationalacademies.org/coi) prohibits the appointment of an individual to a committee authoring a Consensus Study Report if the individual has a conflict of interest that is relevant to the task to be performed. An exception to this prohibition is permitted if the National Academies determine that the conflict is unavoidable and the conflict is publicly disclosed. A determination of a conflict of interest for an individual is not an assessment of that individual’s actual behavior or character or ability to act objectively despite the conflicting interest.
Arthur Lee has a conflict of interest in relation to his service on the Committee on Anthropogenic Greenhouse Gases and the U.S. Climate: Evidence and Impacts because he holds stock in Chevron Corporation and has received reimbursement for travel expenses from Chevron incurred while mentoring employees in his capacity as Chevron Fellow Emeritus.
The National Academies have concluded that for this committee to accomplish the tasks for which it was established, its membership must include someone who has recent experience within the oil and gas sector, particularly in developing corporate internal energy policy on air pollution issues. As described in his biographical summary, Lee has extensive experience as working at the intersection of climate change and energy production, with expertise in oil and gas infrastructure and evaluating the contributions of the oil and gas industry to climate change and strategies for reducing greenhouse gas emissions.
The National Academies have determined that the experience and expertise of Lee is needed for the committee to accomplish the task for which it has been established. The National Academies could not find another available individual with the equivalent experience and expertise who does not have a conflict of interest. Therefore, the National Academies have concluded that the conflict is unavoidable.
The National Academies believe that Lee can serve effectively as a member of the committee, and the committee can produce an objective report, taking into account the composition of the committee, the work to be performed, and the procedures to be followed in completing the study.
John Wall: Disclosure of Unavoidable Conflict(s) of Interest
The conflict of interest policy of the National Academies of Sciences, Engineering, and Medicine (http://www.nationalacademies.org/coi) prohibits the appointment of an individual to a committee authoring a Consensus Study Report if the individual has a conflict of interest that is relevant to the task to be performed. An exception to this prohibition is permitted if the National Academies determine that the conflict is unavoidable and the conflict is publicly disclosed. A determination of a conflict of interest for an individual is not an assessment of that individual’s actual behavior or character or ability to act objectively despite the conflicting interest.
Wall has a conflict of interest in relation to his service on the Committee on Anthropogenic Greenhouse Gases and the U.S. Climate: Evidence and Impacts because he owns stock in Cummins, Shell, and Chevron.
The National Academies have concluded that for this committee to accomplish the tasks for which it was established, its membership must include someone who has experience with the automotive industry focusing on developing emissions policy with the objective of delivering products meeting both commercial and environmental expectations. As described in his biographical summary, Wall has extensive experience working at the intersection of climate change and the automotive industry, with expertise in low-emission internal combustion engines and fuels and the environmental impacts of these emissions sources.
The National Academies have determined that the experience and expertise of Wall is needed for the committee to accomplish the task for which it has been established. The National Academies could not find another available individual with the equivalent experience and expertise who does not have a conflict of interest. Therefore, the National Academies have concluded that the conflict is unavoidable.
The National Academies believe that Wall can serve effectively as a member of the committee, and the committee can produce an objective report, taking into account the composition of the committee, the work to be performed, and the procedures to be followed in completing the study.
Sponsors
National Academy of Sciences Arthur L. Day Fund
Ralph J. Cicerone and Carol M. Cicerone Endowment for NAS Missions
Staff
Amanda Staudt
Lead
Major units and sub-units
Center for Health, People, and Places
Collaborator
Organizational Initiatives
Lead
Climate Crossroads
Lead
Biomedical and Health Sciences Program Area
Collaborator
Earth Systems and Resources Program Area
Collaborator