Media type: E-Article Title: OECD Regions and Cities at a Glance 2020: Breathing clean air in all the cities of the world (SDG 11) imprint: OECD, 2020 Published in: OECD Regions and Cities at a Glance 2020 Language: Not determined DOI: 10.1787/65a765da-en ISSN: 2617-3212 Origination: Footnote: Access State: Open Access