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. 2020 Sep 24;755:142526. doi: 10.1016/j.scitotenv.2020.142526

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© 2020 The Authors

Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Fig. 1 — Relative changes in ‘de-weathered’ air pollutant abundance in the southeast of the UK during the pandemic lockdown period (starting 24/03/2020; denoted by vertical dashed line) with respect to the 2020 average; (a) NO₂, (b) PM_2.5, (c) PM₁₀, (d) O₃. Data grouped by site; site identifiers: Kb = kerbside, UB = urban background, SB = suburban background, RB = rural background. See Table 1 for site codes.