谡 ȯ ˰ Ҹ ̰ ִ , ȯ ü ġ ǵ Ȱ ִ. Ư ü ġ Ȱѵ, ֱ ӻο ̼ơü Ż ū ģٴ ǥǾ.
ý б(The University of California, San Francisco:UCS) þƲ ġ б(The University of Washington-Seattle:UW) ֱ ۺ ̺귯 ̾ (plos medicine) , ų 6鸸 ̻ ƿ 3鸸 ̻ ü Ż 꿡 ϰ ִ . 躸DZⱸ(World Health Organization:WHO) ų 1,500 ̼ư ¾ ִµ, ̼ƿ ƿ õ պ 5 ̸ ߿ ̴. 2015 100 ̵ ̿ , ̼Ƶ Ǿ κ ɸ ū Ÿ. , 翡 ̼ƿ ü Ż 3 2 ź , dz ϴ dz 巯. 9 ǥ ٸ UCS ǽ ̼ 迡 2.5 m(ũι) ̸ ̸ڸ ϴ Ⱑ ӻο ¾ƿ ģٴ ȴ. ڴ ƴ ̸ڿ ߿ ٴϴ ü ġ ϴ ̱ ڳ б(Cornell University) (Max Zhang) ߿ ٴϴ ̸ (Particulate matter:Pm) ١ ߴ.
dz 輺
WHO ǥ α 99% WHO ؿ ġ ϴ ǰ , ҵ ߵ зǴ ϼ Ȯ ũ. WHO ų 420 ϰ ִٰ . WHO γ ź, , ¿ ΰ Ű ̸(Pm) dz ų 380 ̻ ڰ ϴ ϰ ִ. Ư, ƽþƳ ϶ 縷 ̳ ī dz ϰ Ÿµ, ̴. ϴ dz ҽŰ ü 78% ִ١ ߴ. dz ߵ ѵ ƴϴ١ ߴ. 2019 ̱ dz 12,000 Ѵ.
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