Keeping the global consumption within the planetary boundaries

• 成果类型: Article
• 署名作者: Tian, Peipei; Zhong, Honglin; Chen, Xiangjie; Feng, Kuishuang; Sun, Laixiang; Zhang, Ning; Shao, Xuan; Liu, Yu; Hubacek, Klaus
• 署名单位: Shandong University; University System of Maryland; University of Maryland College Park; University of London; University of London School Oriental & African Studies (SOAS); University of Cambridge; Peking University; Peking University; University of Groningen
• 刊物名称: Nature
• ISSN/ISSBN: 0028-4000
• DOI: 10.1038/s41586-024-08154-w
• 发表日期: 2024-11-21
• 关键词: net primary production; safe operating space; carbon footprint; sustainable development; human appropriation; FRAMEWORK; INEQUALITY; aggregation; nitrogen

摘要

The disparity in environmental impacts across different countries has been widely acknowledged1,2. However, ascertaining the specific responsibility within the complex interactions of economies and consumption groups remains a challenging endeavour3-5. Here, using an expenditure database that includes up to 201 consumption groups across 168 countries, we investigate the distribution of 6 environmental footprint indicators and assess the impact of specific consumption expenditures on planetary boundary transgressions. We show that 31-67% and 51-91% of the planetary boundary breaching responsibility could be attributed to the global top 10% and top 20% of consumers, respectively, from both developed and developing countries. By following an effective mitigation pathway, the global top 20% of consumers could adopt the consumption levels and patterns that have the lowest environmental impacts within their quintile, yielding a reduction of 25-53% in environmental pressure. In this scenario, actions focused solely on the food and services sectors would reduce environmental pressure enough to bring land-system change and biosphere integrity back within their respective planetary boundaries. Our study highlights the critical need to focus on high-expenditure consumers for effectively addressing planetary boundary transgressions. An analysis of the environmental footprints of consumption finds that planetary boundary transgressions can be mitigated by following an effective mitigation pathway focused on the food and services sectors and high-expenditure consumers.