Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Risk ratios for all-cause (A), cardiovascular disease (B), respiratory disease (C), and cancer (D) mortality associated with 10-μg/m3 increases in 12- to 60-month moving average exposure to particulate matter less than or equal to 2.5 μm in aerodynamic diameter (PM2.5) nationwide, United States, 2000–2008. Bars, 95% confidence intervals. COPD, chronic obstructive pulmonary disease.
