Be the first to hear about new reports, surveys and updates from Mason 4C
Be the first to hear about new reports, surveys and updates from Mason 4C
What We Do
Our research informs programs that activate the most trusted voices in America. Our programs activate trusted voices at scale with proven messages to help build public and political will for equitable climate solutions.
Climate Change in the American Mind
Our public opinion polling has explored and tracked public understanding of climate change since 2008.
Climate Matters in the Newsroom
Provides weathercasters and journalists nationwide with climate reporting resources about the relevance of climate change in their communities.
Medical Society Consortium on Climate and Health
The Consortium raises public awareness about the health harms of climate change, and the health benefits of climate solutions.
republicEn
Led by former South Carolina Congressman Bob Inglis, we encourage climate leadership among conservative Americans and elected officials.
Virginia Climate Center
Works to enhance Virginia’s resilience to the impacts of climate variability and climate change.
Our Latest Work
Explore Climate Change in the American Mind
These graphs illustrate national public opinion over time and across several sociodemographic variables, as well as political views, to show the diversity of Americans’ views on climate change and how much Americans engage with the issue. About the Tool Public opinion...
Discover unique insights with the updated CCAM Explorer for 2026
We are pleased to announce the latest version of the Climate Change in the American Mind (CCAM) interactive dashboard and data visualizer – the CCAM Explorer. The tool and dataset, which include data going back to 2008, is updated to include data from 2025, letting...
Optimizing health professionals’ climate advocacy messages
Health professionals are among the most trusted sources of information about climate change and health in the United States. Their voices can help people understand how climate change affects health and build support for climate solutions. But what kinds of messages...
What are the top social media platforms used by each of Global Warming’s Six Americas?
Americans are increasingly getting their news from social media. In Spring 2025, we found that a growing percentage of Americans say social media is their most important source of news. This increase is especially pronounced among audiences that are more engaged with...
What do Global Warming’s Six Americas think about data centers?
The number of data centers is rapidly increasing across the United States as investment in artificial intelligence grows. Although data centers can generate economic benefits, they also increase demand for electricity, water, and land, with potential public...
New study examines fossil fuel industry communication and its public impacts
We are pleased to share our new article, Fossil Fuel Industry Communication Strategies and Public Responses: A Scoping Review, published in Environmental Research: Energy. The study systematically reviewed all peer-reviewed studies published between 1988 and...
Explore Climate Change in the American Mind
These graphs illustrate national public opinion over time and across several sociodemographic variables, as well as political views, to show the diversity of Americans’ views on climate change and how much Americans engage with the issue. About the Tool Public opinion...
Discover unique insights with the updated CCAM Explorer for 2026
We are pleased to announce the latest version of the Climate Change in the American Mind (CCAM) interactive dashboard and data visualizer – the CCAM Explorer. The tool and dataset, which include data going back to 2008, is updated to include data from 2025, letting...
Explore Climate Change in the American Mind
These graphs illustrate national public opinion over time and across several sociodemographic variables, as well as political views, to show the diversity of Americans’ views on climate change and how much Americans engage with the issue. About the Tool Public opinion...
Discover unique insights with the updated CCAM Explorer for 2026
We are pleased to announce the latest version of the Climate Change in the American Mind (CCAM) interactive dashboard and data visualizer – the CCAM Explorer. The tool and dataset, which include data going back to 2008, is updated to include data from 2025, letting...
Optimizing health professionals’ climate advocacy messages
Health professionals are among the most trusted sources of information about climate change and health in the United States. Their voices can help people understand how climate change affects health and build support for climate solutions. But what kinds of messages...
What are the top social media platforms used by each of Global Warming’s Six Americas?
Americans are increasingly getting their news from social media. In Spring 2025, we found that a growing percentage of Americans say social media is their most important source of news. This increase is especially pronounced among audiences that are more engaged with...
Support 4C
The work of Mason 4C is made possible through generous philanthropic support. You can support our research and programs directly through a tax-deductible donation processed by the George Mason University Foundation.
Our Impact
Since 2007, Mason 4C has combined social science research with real-world programs to activate trusted voices, increase public understanding, and build support for climate solutions.
Through our core initiatives, Mason 4C informs media, policy, and public discourse, helping build the understanding and public will needed to advance equitable climate solutions.
Climate Matters
Provides more than 1,100 local weathercasters with localized climate reporting data. That's more than half of America's TV weathercasters.
Reporting on Climate Matters
Our research shows there's been a 100 fold increase in on-air climate reporting by weathercasters
The Power of the Health Voice
The Medical Society Consortium on Climate and Health has 50 national medical societies representing over 700,000 physicians—70% of U.S. doctors
Most Americans Think Global Warming Is Happening
Americans who think global warming is happening outnumber those who think it is not happening by a ratio of nearly 5 to 1 (74% versus 15%)
Concern about Global Warming
About two-thirds of Americans (66%) say they are at least “somewhat worried” about global warming. This includes 30% of Americans who say they are “very worried.”
Stay Connected
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Stay Connected
Get the latest Mason 4C research, Climate Notes, events, and practical insights on climate communication delivered to your inbox.