Particulate Matter 2.5
Particulate Matter 2.5
Particulate Matter 2.5
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Mortality Risk Ratio<br />
Six Cities Cohort Follow-up<br />
1.4<br />
1.3<br />
1.2<br />
1.1<br />
1.0<br />
0.9<br />
0.8<br />
0.7<br />
Portage<br />
Topeka<br />
Watertown<br />
Kingston<br />
St. Louis<br />
Steubenville<br />
1974 - 1989<br />
1990 - 1998<br />
0 5 10 15 20 25 30 35<br />
Laden et al, 2006<br />
PM <strong>2.5</strong> ( g/m 3 )
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