哈佛研究：PM2.5 降一点， 美国人民的预期寿命马上增加

哈佛研究：PM2.5 降一点， 美国人民的预期寿命马上增加。 女人寿命比男的增加的更多：）））

http://articles.latimes.com/2012/dec/04/science/la-sci-sn-fine-particle-pollution-20121204
 

Life expectancy rises as fine particle air pollution drops

December 04, 2012|Bettina Boxall

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Traffic travels north on the Harbor Freeway in Los Angeles. Vehicles are… (Genaro Molina / Los Angeles…)

A new study links even small reductions in fine particle air pollution to increased life expectancy.
 
Researchers who compared data from 545 counties across the U.S., including many in California, found that a drop in fine particulate matter, known as PM2.5, between 2000 and 2007 corresponded with an average rise in life expectancy of 0.35 of a year.

The study, led by researchers at the Harvard School of Public Health, is described as the largest to date to find public health benefits from ongoing reductions in U.S. air pollution levels.

Fine particles, which are about 1/30th the average width of a human hair, come from a variety of sources, including vehicles, smokestacks and fires. They also form when gases emitted by power plants, industry and vehicle engines react in the atmosphere.

The tiny particles can lodge deeply in the lungs, aggravating heart and lung diseases. Those most at risk include people who are active outdoors, children and the elderly.

Nationally, average concentrations of particulate matter, both fine and coarse, have fallen over the years. The researchers wanted to know whether the relatively smaller decreases in PM2.5  levels since 2000 are still improving life expectancy.

The study, which appears in Monday's online edition of the journal Epidemiology, controlled for changes in other factors, such as smoking and socioeconomic status. The findings showed that cutting fine particle pollution had the greatest effect on life expectancy in urban areas – possibly because of differences in particle composition. Women also seemed to benefit more than men.

“This study provides strong and compelling evidence that continuing to reduce ambient levels of PM2.5 prolongs life,” said coauthor Francesca Dominici, professor of biostatistics at the Harvard School of Public Health.

Citing scientific evidence that exposure to particle pollution causes premature death and is linked to a variety of significant health problems, the U.S. Environmental Protection Agency has proposed strengthening air pollution standards for fine particles.

 

所有跟帖： 

• 谢谢这个文献搜查，更小的雾霾颗粒能沉入肺脏的深部，造成深刻的肺损害， 影响寿命。 -御用文人- ♀ (0 bytes) () 03/19/2015 postreply 22:45:30

• 谢谢您的comment！ -志在千里- ♀ (0 bytes) () 03/19/2015 postreply 22:54:39

• 这不科学啊，是民同志已经引经据典证明PM2.5对人体无害了，是吸（二手）烟把人杀死了 -ephd- ♂ (0 bytes) () 03/20/2015 postreply 06:03:10

• 谢谢分享，MAKE SENSE，和我自己的推论一致。 -ME_Professor- ♂ (0 bytes) () 03/20/2015 postreply 06:45:58

• 美金已经触顶下滑，黄金也因此触底反弹。。。 -御用文人- ♀ (0 bytes) () 03/20/2015 postreply 09:07:12

• 这与 duddan 昨天的帖子【2013年的一篇文章】一个意思。杜兄标题抓眼球水平急需提高。 -欲千北- ♂ (0 bytes) () 03/20/2015 postreply 07:01:05

• 谢谢分享! -Lily168- ♀ (0 bytes) () 03/20/2015 postreply 10:53:49