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. Author manuscript; available in PMC: 2014 Mar 24.
Published in final edited form as: Ecohealth. 2013 Jun;10(2):159–165. doi: 10.1007/s10393-013-0830-x

Figure 1.

Figure 1

Particles produced while inside (white) or outside (gray), performing sweeping (hatched) or walking (clear), throughout each season in central and southwest Montana 2011–2012. Numbers represent mean (±SD) number of particles produced per minute for each size category (0.3, 0.5, 1, 2.5, 5 and 10).