Too much consumption or too high emissions intensities? Explaining the high consumption-based carbon footprints in the Nordic countries

Consumption-based carbon footprints have been widely used to examine how different demand-side solutions can reduce the emissions from personal consumption. This study not only utilized consumption-based carbon footprints to examine how people living in affluent nations like the Nordic countries can live 1.5 degree warming compatible lifestyles, but it also expanded on this analysis by focusing on which level of GHG intensity per monetary unit of expenditure it is possible to remain below a 1.5-degree compatible target level at different levels of consumption expenditure. To analyze the GHG intensity per monetary unit of consumption, first, the consumption-based carbon footprints from around 8,000 survey responses from the Nordic countries were calculated. Then the average carbon intensity per unit of monetary spending was calculated across the income deciles in each country and compared to target levels that align with the 1.5-degree compatible reduction pathways by 2030. Finally, the intensities for selected low-carbon consumption choices (vegan/vegetarian diet, driving an EV, renewable electricity for the home, not owning a car, and no air travel) were calculated and compared to the same baseline targets. Our results showed that all of the average carbon footprints and GHG intensities were above the target levels in all of the countries. However, when comparing respondents having adopted two or more low-carbon consumption choices, there were examples of average intensities that met the target levels. The adoption rates of these low-carbon consumption choices were low though, which illustrates the necessity for high adoption rates of multiple low-carbon consumption choices in order to materialize the potential of demand-side climate change mitigation options. Our findings highlight the importance of examining the GHG intensity of per monetary unit expenditure to inform future policies on demand-side solutions and to improve the climate-literacy of consumers, so they can make more informed decisions on consumption choices.