Abstract
After drawing an inventory of developments in Participatory Action Research (RAP) and Citizen Sciences (SC), this article presents an innovative device called Artivistes-atelier (AA) aimed to help public policies on the air quality including citizens in decision-making by considering social environmental constraints which include the thorny metrological aspects. The article gets through how the device (AA) is integrated and developed in two complementary research projects (Air-Climate-Health-Society & Art and BREATHE) on air quality up to provide concrete answers to complex problems with a pragmatic critical and reflexive approach.