A recent study published in Communications Sustainability has estimated that the world's highest-consuming 10 percent of people cause environmental damage worth between $1.7 trillion and $5.7 trillion annually. Over 60 percent of these individuals reside in the United States and the European Union, while only about two percent are from India.
Key Findings
The research, conducted by scientists from the University of Oxford and Leiden University, analyzed consumption-based environmental footprints across six countries: Brazil, China, Egypt, Germany, India, and the United States. They assessed monetary costs related to biodiversity loss, climate change, nitrogen and phosphorus pollution, and freshwater use.
Biodiversity Loss and Climate Change
Biodiversity loss accounts for 47 to 56 percent of the total damage, making it the largest contributor. Climate change follows, contributing 36 to 45 percent of the overall cost.
Per-Person Impacts
The annual damage per person in the global top 10 percent averages between $2,300 and $7,500. However, in the United States, where per-person impacts are highest, this figure climbs to $19,000 to $63,000. In India, the per-person damage is estimated at $410 to $1,400, equivalent to 0.8 to 2.8 percent of income or 0.2 to 0.5 percent of wealth.
Mitigation Responsibility
The authors emphasize the mitigation responsibility of the top 10 percent, highlighting the potential revenue from environmental taxes if the polluter-pays principle is adopted. Co-author Paul Behrens, a professor at the University of Oxford, noted that the top 10 percent not only cause the most damage but also hold significant leverage to reduce it. Their investments, from pensions to infrastructure, shape industries and societal norms.
Inequality and Taxation
The study underscores that environmental pricing or taxation can incentivize a shift toward sustainable consumption. Focusing taxes on the top 10 percent can improve equity. In low-income countries, carbon taxes are progressive, while in high-income countries, taxing luxury consumption rather than basic goods reduces inequality.
Mitigation policies directed at the world's top 10 percent consumers can help cut emissions and pollution, raise revenue for sustainability transitions, and enhance equity simultaneously, the authors concluded.
