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Fig. 19 | Environmental Evidence

Fig. 19

From: How effective is ‘greening’ of urban areas in reducing human exposure to ground-level ozone concentrations, UV exposure and the ‘urban heat island effect’? An updated systematic review

Fig. 19

Forest plot for effect of green areas on ground-level NOx concentrations. The Y-axis shows study first author and date. The X-axis shows the difference in NOx concentrations between green and non-green areas. Some studies are associated with more than one effect size if the data were presented for different seasons or times of day. For full citation and meta-data for each study see Additional files 1 and 2 for details of data sources

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Environmental Evidence

ISSN: 2047-2382