I combine rock magnetism, participatory sciences and transdisciplinary research to tackle air pollution in urban zones and mining zones. I currently lead the Air Geo project (Belmont-Forum) https://airgeo.hypotheses.org/category/airgeo. In collaboration with scientists from atmospheric sciences, humanities and social sciences, physics and artists and NGO, we use tree bark to capture airborne particles and study them in our laboratory, introducing sobriety in air monitoring research.