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2012年12月14日,老美把PM2.5的标准值降低到12微克每立方米(年均值),并说由此带来的健康收益为40-90多亿美元(原来的值好像是15)。
原文:
On December 14, 2012, EPA updated the national air quality standards for PM 2.5 by revising the annual standard to 12 micrograms per cubic meter (ug/m3). Updated last in 1997, the revised annual standard will have major economic benefits with comparatively low costs. EPA estimates health benefits of the revised standard would range from $4 billion to over $9 billion per year.
原文链接:
PM2.5也称为苏特(SOOT),意为烟灰、煤烟,就是指小于等于2.5微米的颗粒。苏特是衡量空气污染的重要指标。
苏特能够进入肺的深处,会带来一系列严重的健康危害。这包括死的早、心脏病、中风、急性支气管炎、儿童哮喘加重等。
翻译可能不当,请参照原文:
Soot, also known as fine particle pollution (PM2.5), can penetrate deep into the lungs and has been linked to a wide range of serious health effects, including premature death, heart attacks, and strokes, as well as acute bronchitis and aggravated asthma among children.
曹相生
2013,1.18
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