Passive air monitoring using bark: A participatory science approach to metal recycling impacts in West Africa

Recycling metals like iron and lead appears essential for sustainable development, yet it often has severe consequences for the quality of life in communities near recycling sites. Citizen science and transdisciplinary approaches—uniting researchers from the physical, natural, and social sciences, with citizens and non-academic partners—are increasingly recognized as vital to addressing such complex Anthropocene challenges. However, the role of co-produced knowledge in fostering the sustainable transformation of affected territories remains to be fueled by inspiring examples.

We present here the AirGeo project, a community-based participatory research initiative addressing the environmental and social impacts of metal recycling activities in West Africa, with a specific focus on air pollution. We focus on Sebikotane, Senegal, a rapidly urbanizing city located 45 km from the capital, Dakar, and home to three recycling plants specializing in steel and lead batteries. The project aims to co-produce, evaluate, and share data on air quality in this understudied area. The transdisciplinary team encompasses experts in geosciences, aerology, anthropology, literature, and botany, alongside artists, municipal authorities, NGOs, and local citizens, who are actively involved as non-academic partners.

We will present the use of passive bio-sensors made from tree bark, combined with environmental magnetism and geochemistry, to produce air quality data. Furthermore, the project leverages arts—forum theater, live sketching, literature, and design—as innovative tools to translate scientific concepts and disseminate knowledge. By combining participatory science with artistic expression, the AirGeo project exemplifies a novel approach to addressing environmental issues and promoting future sustainable transformations for this area.