Economists suggest that displaying environmental impact labels on supermarket food, combined with imposing taxes on the most carbon-intensive items, could potentially reduce the UK’s greenhouse gas emissions by nearly five percent while benefiting society overall.
Food production and consumption contribute to one-third of global greenhouse gas emissions, prompting researchers to see significant potential for new climate mitigation strategies in this domain.
“We created a simulated online supermarket and gathered data from approximately 5,000 UK-based respondents about their typical purchasing habits, frequency, and quantities,” stated Dr. Michele Faccioli from the University of Trento.
Intensive
Implementing carbon taxes presents challenges, particularly since such measures often lack public support and disproportionately affect less affluent households.
“Our research indicates that redistributing tax revenues on a per capita basis could effectively address the inequalities arising from the tax, thereby enhancing the fairness of the policy,” Dr. Faccioli explained.
Professor Ian Bateman, Director of the University of Exeter’s Land, Environment, Economic and Policy Institute, remarked, “These results suggest that combining carbon taxes with carbon labeling can reduce greenhouse gas emissions while minimizing costs for consumers and improving overall societal welfare.”
A team from the University of Trento, in collaboration with the University of Exeter, conducted a study to explore optimal methods for reducing the climate impact of food while maximizing societal benefits. The study was published in the Journal of Environmental Economics and Management.
Participants in the study were asked if and how they might alter their usual food purchases following the introduction of carbon labels, which indicate the carbon footprint of each product, and/or taxation on the most carbon-intensive foods.
Public
The study revealed that carbon labels led to a 5.6 percent reduction in the carbon content of the average food basket, equating to 2.7 percent of the UK’s greenhouse gas emissions.
A carbon tax of £60 per tonne of CO2 equivalent on the most carbon-intensive products nearly doubled this effect, reducing carbon footprints by about 10 percent but at a cost of £79 per person annually.
Researchers found that lowering the tax rate to £28 per tonne of CO2 equivalent, when combined with labeling, could achieve a similar 10 percent reduction in the average shopping basket’s carbon footprint—equivalent to 4.7 percent of UK emissions—at a cost of only £34 per person annually.
This cost, according to the researchers, is outweighed by the social benefits of reduced greenhouse gas emissions and increased public sector revenues.
Rich
The overall net social benefit from a combined tax and labeling approach translates to a monetary value of approximately £13 per person per year. This is more than double the £6 benefit from a tax-only scenario and significantly higher than the £8 benefit from carbon labeling alone.
The study also indicates that the impact of these policies varies depending on respondents’ dietary habits.
Dr. Carlo Fezzi from the University of Trento added, “We discovered that households with meat-rich diets tend to be more responsive to carbon label displays, suggesting that providing more information to this group about the emissions impact of their food choices could lead to significant improvements.”
The welfare impacts of carbon taxes and labels on food demand is featured in the Journal of Environmental Economics and Management.
This Author
Brendan Montague is an editor at The Ecologist.
