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. 2019 May 16;18:50. doi: 10.1186/s12940-019-0487-1

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© The Author(s). 2019

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. 3 — NO₂ distributions during children’s primary activities. a, NO₂ at home – 20 m buffer around home location (C_h); b, NO₂ playing in the neighbourhood – 500 m around home location (C_p); c, NO₂ going at school or following parents – 2000 m around home location (C_t); d, NO₂ being at school – 20 m around all schools within 2000 m around home (C_s)