Toward a smoke and aerosol-free United Nations: past, present and future of a meaningful endeavor. SciELO Preprints, 2025. DOI: 10.1590/SciELOPreprints.13794. Disponível em: https://preprints.scielo.org/index.php/scielo/preprint/view/13794. Acesso em: 14 maio. 2026.