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在洛杉矶测量危险空气污染物排放和度的不平等

Jennifer Ofodile¹, Eva Y Pfannerstill¹, Caleb Arata¹

¹Department of Environmental Science, Policy, and Management, University of California, Berkeley, Berkeley, California 94720, United States.

Environmental science & technology

|April 12, 2025

概括

危险空气污染物 (HAP) 在洛杉矶的弱势社区更高,不成比例地影响低收入的西班牙裔和亚裔居民. 非交通来源,如工业和溶剂,对这种环境不公正作出了重大贡献.

科学领域:

环境科学环境科学
公共卫生公共卫生
城市规划城市规划

背景情况:

空气污染不成比例地影响了洛杉矶的有色人种社区和低收入居民.
缺乏在全市范围内进行危险空气污染物 (HAP) 的常规测量.
现有的数据往往无法捕捉到HAP排放和度的全部范围.

研究的目的:

为了调查洛杉矶HAPs的空间分布.
为了确定不同的人口群体中HAP暴露的差异.
评估各种排放源对HAP不平等的贡献.

主要方法:

使用高分辨率的空间测量 (∼2公里) 来测量洛杉矶的HAP排放量和度.
将空气质量数据与美国人口普查信息结合起来,分析人口统计相关性.
分析了排放比率 (例如,与) 以推断源贡献.

主要成果:

在加利福尼亚的弱势社区 (DAC) 和低收入的西班牙裔和亚洲人口普查区观察到17种HAP的较高度和排放.
在这些社区,由于与交通有关的排放,,氧化 (NOx) 和一氧化碳 (CO) 度高达60%以上.
在有大量西班牙裔人口的DAC中,托与的排放比率高于3表明了重要的非交通HAP来源,监管库存低估了这些排放.

结论:

洛杉矶的环境正义努力必须解决由交通和非交通来源驱动的HAP不平等问题.
挥发性化学产品是越来越重要的排放来源,有助于HAP差异.
考虑到各种排放源的有针对性的干预措施对于减轻脆弱社区的HAP负担至关重要.

关键词:

在HAP的排放源.洛杉矶洛杉矶是一个城市.环境不平等的环境不平等危险的空气污染物 (HAPs) 危险的空气污染物空间分布的空间分布

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