EPA Regulation Of 'Ultrafine' PM Still Distant Prospect Despite Health Risks

Stuart Parker

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EPA Regulation Of 'Ultrafine' PM Still Distant Prospect Despite Health Risks

机译：尽管存在健康风险，但EPA对“超细” PM的监管仍遥遥无期

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Air quality experts at a recent scientific workshop on "ultrafine" particulate matter (UFP) agreed that tiny particles pose significant health risks compared to larger fine particulate matter (PM2.5) and coarse particulate matter (PM10), but any EPA regulation of UFP appears to be a distant prospect given doubts about how to craft such rules. UFP penetrates cells in the body more readily than larger particles, experts said, making it potentially more dangerous. While several experts at the workshop agreed on UFP's risks to the public, they thought it unlikely that regulators would be able to set federal or state air standards for the pollutant in the near future. Questions that remain to be answered prior to regulation of the particles include how to define the components of UFP, what size of UFP to regulate, and how to measure concentrations of UFP emissions.

机译：最近在“超细”颗粒物（UFP）科学研讨会上的空气质量专家一致认为，与较大的细颗粒物（PM2.5）和粗颗粒物（PM10）相比，细颗粒对健康构成重大威胁，但EPA对UFP的任何规定由于对如何制定此类规则存有疑问，这似乎是遥不可及的前景。专家说，UFP比大颗粒更容易穿透体内的细胞，使其具有更大的危险性。尽管研讨会上的几位专家都同意UFP对公众的风险，但他们认为监管机构不太可能在不久的将来为污染物设定联邦或州空气标准。在调节颗粒之前仍有待解决的问题包括如何定义UFP的成分，要调节的UFP大小以及如何测量UFP排放物的浓度。

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《Inside EPA's environmental policy alert》 |2015年第5期|7-8|共2页
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Stuart Parker;
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EPA Regulation Of 'Ultrafine' PM Still Distant Prospect Despite Health Risks

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