Figure 3
From: Air pollution in Boston bars before and after a smoking ban
The regression of respirable particle pollution against carcinogen pollution in 6 of 7 Boston pubs studied before the smoking ban. Pub # 6 is excluded due to apparent contamination from kitchen fumes. The ratio for RSP/PPAH in the same units is about 2000:1. This is the same RSP/PPAH ratio found in the Wilmingon, Delaware study (Repace, 2004).