A recent study has found that the world's highest-consuming 10% of people are responsible for up to $5.7 trillion in environmental damage annually, a figure larger than the economies of all countries except the United States and China. This damage bill includes costs from climate disruption, biodiversity loss, nutrient pollution, and freshwater use.
Key Findings
The research, conducted by the University of Oxford and the University of Leiden, indicates that mega-consumers are predominantly located in the global north, representing over half the population of the US and 40-45% of people in the European Union. The most harmful consumption patterns are linked to food, particularly red meat which drives deforestation, and energy use including air travel and home heating and cooling, which often rely on fossil fuels.
Damage Costs by Region
For someone in the top 10% globally, the average annual environmental damage ranges from $2,300 to $7,500. In the United States, this figure climbs to $19,000-$63,000. The report also notes that high-consuming households in emerging economies are catching up, with China's top 10% now surpassing Germany's in terms of environmental damage.
Biodiversity and Climate
Biodiversity loss accounts for the largest share of the damage, making up 47-56% of the total, while the climate crisis contributes 36-45%. The authors emphasize that these crises should be addressed together rather than as separate policy challenges.
Conservative Estimates
The study cautions that the true environmental cost is likely even higher, as the calculations only cover four of nine planetary boundaries and exclude the impacts of investments. Paul Behrens, a co-author from the Oxford Martin School, stated: "If anything, these numbers are conservative. The bill leaves out the emissions tied to wealthy people's investments." A separate Greenpeace study estimated that the assets of the world's richest 1% are associated with a quarter of global emissions, causing nearly $1 trillion in climate damage annually.
Policy Implications
The report suggests that governments could target high-consuming groups through taxes on luxury goods, wealth, and carbon, which would reduce emissions and pollution while raising revenue for sustainability transitions and reducing inequality. Behrens added: "The top 10% are important not only because they cause the most damage but also because they hold the most leverage to reduce it."
