AUTHOR=Ogunseitan Oladele A. TITLE=Planetary boundaries for recalcitrant materials and toxic chemical pollutants: specifications for sustainable safe operating zones JOURNAL=Frontiers in Environmental Science VOLUME=Volume 13 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/environmental-science/articles/10.3389/fenvs.2025.1593947 DOI=10.3389/fenvs.2025.1593947 ISSN=2296-665X