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. 2017 Dec 5;16(Suppl 1):118. doi: 10.1186/s12940-017-0325-2

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© The Author(s). 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — The impacts of meteorological and climate variables on O₃ and PM concentrations as determined from studies in the literature. ↑ represents an increase in the variable and↓ a decrease. A Red (blue) box outlines depict where changes in a given variable predict an increase (decrease) in O₃ or PM