Members of the public broadly agree that carbon emissions are too high, and that the wealthy should do more of the heavy lifting to reduce them, according to a new study based on survey data from Germany. But people tend to have a too-rosy view of their own personal carbon footprint—a pattern that is especially pronounced among the wealthy.
“Our findings challenge the notion that climate action is deeply divisive or that public opinion is polarized,” says study team member Johanna Köchling, a graduate student at the University of Konstanz in Germany. “Instead, they reveal a broad consensus on both the urgency of action and the need to ensure fairness.”
Globally, the wealthiest 10% of individuals are responsible for nearly half of all greenhouse gas emissions, while the poorest 50% are responsible for only about one-tenth. This phenomenon—known as carbon inequality—is becoming well known in broad strokes.
But some studies suggest that people tend to underestimate just how lopsided the distribution of emissions is. And little research has addressed what people think a fair allocation of carbon emissions across income groups would ideally be.
In the new study, Köchling and her collaborators analyzed responses to a questionnaire administered to 1,386 people as part of a larger, long-term public opinion study in Germany—Europe’s top emitter of greenhouse gases and a country with relatively high levels of both income and carbon inequality by European standards.
Participants were asked how important it is to them to have a good (i.e., small) carbon footprint. They were then asked to mentally divide the German population into five groups by wealth, and rate how big they think each group’s carbon footprint actually is as well as how big it ought to be. Finally, they rated their own personal carbon footprint.
More than 80% of participants considered a good carbon footprint to be important, the researchers report in the journal Nature Communications. Nearly 80% preferred a good or very good footprint for each of the wealth groups.
Most people across all wealth groups were aware that the wealthy have a heftier carbon footprint than the poor, and that the top 20% have the worst carbon footprint. “The majority of respondents recognize the current reality of carbon inequality with surprising accuracy,” Köchling says.
What’s more, people across all wealth quintiles wanted those at the top to have smaller carbon footprints than they currently do. More than 90% of participants thought the highest wealth quintile should have a good or very good carbon footprint, but only 78.5% of people were prepared to demand this of the lowest quintile.
When asked to rate their own carbon footprints, though, sober realism went out the window and motivated reasoning came to the fore. People rated their own carbon footprint as better than that of others in their wealth group and closer to their ideal level.
This pattern was seen across all wealth quintiles, but was especially pronounced among the richest.
The “contrast between the perceived reality and the desired ideal distribution reveals a clear societal demand for change,” Köchling says. “Yet, at the individual level, many already see themselves as part of the solution.”
The researchers call this discrepancy the “carbon perception gap.”
Closing the carbon perception gap could be difficult, since people tend to be very motivated to maintain a positive self-image. But getting people to have a more accurate view of their own carbon footprints is important to generate the necessary public support for carbon taxation and other climate policies, the researchers say.
Source: Köchling J. et al. “The carbon perception gap in actual and ideal carbon footprints across wealth groups.” Nature Communications 2025.
Image: ©Anthropocene Magazine
