Brown University, Providence, RI, USA.
Princeton University, Princeton, NJ, USA.
Nature. 2024 Oct;634(8036):1125-1131. doi: 10.1038/s41586-024-08046-z. Epub 2024 Oct 23.
Air pollution in South Asia is a health emergency, responsible for 2 million deaths every year. Crop residue burning accounts for 40-60% of peak pollution during the winter harvest months. Despite being illegal, this practice remains widespread. Any solution to curb the problem necessitates government action at scale. Here we study whether leveraging the incentives of bureaucrats tasked with controlling burning can mitigate this phenomenon. Using a decade of wind, fire and health data from satellites and surveys from the Demographic and Health Surveys Program, we show that crop burning responds to bureaucrat incentives: fires increase by 15% when wind is most likely to direct pollution to neighbouring jurisdictions, and decrease by 14.5% when it pollutes their own. These effects intensify with stronger bureaucratic incentives and capacity. We also find that bureaucrat action against burning deters future polluters, further reducing fires by 13%. Finally, using an atmospheric model, we estimate that one log increase in in utero exposure to pollution from burning raises child mortality by 30-36 deaths per 1,000 births, underscoring the importance of bureaucrat action. Contrary to the growing beliefs that the problem of crop burning is intractable, these findings highlight specific ways in which existing bureaucrats, when properly incentivized, can improve environmental management and public health outcomes.
南亚的空气污染是一场卫生紧急事件,每年导致 200 万人死亡。农作物秸秆焚烧占冬季收获高峰期污染的 40-60%。尽管这种做法是非法的,但仍普遍存在。任何遏制这一问题的解决方案都需要政府采取大规模行动。在这里,我们研究了利用负责控制焚烧的官僚的激励措施是否可以减轻这一现象。我们使用了来自卫星的十年风和火灾以及健康数据,以及来自人口与健康调查的调查数据,结果表明,作物焚烧对官僚激励措施做出了响应:当风最有可能将污染吹向邻近管辖区时,火灾增加了 15%,当污染到他们自己的管辖区时,火灾减少了 14.5%。这些影响随着官僚激励措施和能力的增强而加剧。我们还发现,官僚采取行动打击焚烧行为,阻止了未来的污染者,进一步减少了 13%的火灾。最后,我们使用大气模型估计,在子宫内暴露于燃烧产生的污染每增加一个对数,儿童死亡率就会增加 30-36 人,每 1000 人出生,这凸显了官僚行动的重要性。与日益增长的观点相反,即作物焚烧问题难以解决,这些发现强调了现有官僚在得到适当激励的情况下,改善环境管理和公共卫生成果的具体途径。