UID435669
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金钱136004
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帖子706
注册时间2007-8-23
最后登录2009-9-13
中级会员
  
交易诚信度0
注册时间2007-8-23
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"The method used to determine the number of particles in the air is PM10, which measures all particles less than 10 microns in diameter. What is really doing the harm are the smaller particles, those which are PM2.5 [2.5 microns or less]. Better diesel engines haven't reduced the number of particles, just made them smaller and more harmful. Weight for weight, diesel is becoming more harmful, though there is less of it.
"Almost all diesel exhausts are PM1 or less. They're the ones which actually go into the lungs, and the finest ones go inside the cells of the lungs. Anything bigger than PM2 gets caught up in the nasal passages."
看来PM10数据达标也不解决问题啊。 |
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