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      Using green infrastructure to improve urban air quality (GI4AQ)

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          Abstract

          As evidence for the devastating impacts of air pollution on human health continues to increase, improving urban air quality has become one of the most pressing tasks facing policy makers world-wide. Increasingly, and very often on the basis of conflicting and/or weak evidence, the introduction of green infrastructure (GI) is seen as a win–win solution to urban air pollution, reducing ground-level concentrations without imposing restrictions on traffic and other polluting activities. The impact of GI on air quality is highly context dependent, with models suggesting that GI can improve urban air quality in some situations, but be ineffective or even detrimental in others. Here we set out a novel conceptual framework explaining how and where GI can improve air quality, and offer six specific policy interventions, underpinned by research, that will always allow GI to improve air quality. We call GI with unambiguous benefits for air quality GI4AQ. However, GI4AQ will always be a third-order option for mitigating air pollution, after reducing emissions and extending the distance between sources and receptors.

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          Most cited references72

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          The Model of Emissions of Gases and Aerosols from Nature version 2.1 (MEGAN2.1): an extended and updated framework for modeling biogenic emissions

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            Air pollution removal by urban trees and shrubs in the United States

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                Author and article information

                Contributors
                +44 7581 189858 , n.hewitt@lancaster.ac.uk , https://www.lancaster.ac.uk/lec/about-us/people/nick-hewitt
                k.s.ashworth1@lancaster.ac.uk , https://www.lancaster.ac.uk/lec/about-us/people/kirsti-ashworth
                a.r.mackenzie@bham.ac.uk , https://www.birmingham.ac.uk/staff/profiles/gees/mackenzie-rob.aspx
                Journal
                Ambio
                Ambio
                Ambio
                Springer Netherlands (Dordrecht )
                0044-7447
                1654-7209
                16 March 2019
                16 March 2019
                January 2020
                : 49
                : 1
                : 62-73
                Affiliations
                [1 ]GRID grid.9835.7, ISNI 0000 0000 8190 6402, Lancaster Environment Centre, , Lancaster University, ; Lancaster, LA1 4YQ UK
                [2 ]GRID grid.6572.6, ISNI 0000 0004 1936 7486, Birmingham Institute for Forest Research and School of Geography, Earth and Environmental Sciences, , University of Birmingham, ; Birmingham, B15 2TT UK
                Author information
                http://orcid.org/0000-0001-7973-2666
                Article
                1164
                10.1007/s13280-019-01164-3
                6889104
                30879268
                fcc03b25-39b4-4456-9d55-7399dbaed4d9
                © 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.

                History
                : 4 October 2018
                : 4 February 2019
                : 27 February 2019
                Categories
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                © Royal Swedish Academy of Sciences 2020

                Sociology
                air pollution,air quality,green infrastructure,urban environment
                Sociology
                air pollution, air quality, green infrastructure, urban environment

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