Fig. 1: Maps of stillbirths attributable to PM2.5 exposure in the 137 countries.
From: Estimation of stillbirths attributable to ambient fine particles in 137 countries

PM2.5 exposure (a), number (b), and fraction (c) of stillbirths attributable to exposure in 2015 in the 137 countries. Gray dots in panel (a) are the surveyed locations for the samples from 54 low- and middle-income countries used to derive the exposure–response curves.