Cet article présente les premiers résultats d'une recherche s'appuyant sur un dispositif original Artivistes-atelier en recherche action participative analysant la fabrique participative des politiques publiques prenant en compte l'air, notamment les Plans Climat Air Énergie Territoriaux PCAET sur le territoire autour de Montpellier. En détaillant le design élaboré, l'article décrit le processus participatif permettant la construction d'une cartographie dynamique des actants impliqués/impactés et leur capacité d'action sur la qualité de l'air à l'échelle du territoire de Montpellier. Ce résultat permet de questionner par le prisme du dispositif Artivistes-atelier, les ressors et les potentialités de la mobilisation citoyenne relative à la démocratisation des enjeux socioenvironnementaux englués dans le mille institutionnel des modes de gouvernance territoriaux. Pour cela l'article décrit plus largement l'expérience de terrain dont est issu le dispositif, une expérience pragmatique, réflexive et critique. Cet article est l'occasion de construire un premier jalon comparatif s'intégrant dans un projet ADEME en R&D, intitulé Air Climat Santé Société & Art visant dans une logique de Recherche Action Participative à accompagner la mise en oeuvre des politiques publiques en faveur de la qualité de l'air extérieur. Les résultats présentés dans l'article et les limites identifiées du dispositif Artivistes-atelier permettent de nourrir la réflexion sur les potentialités de prise en charge des enjeux sur la qualité de l'air extérieur par l'ensemble des acteurs d'un territoire avec comme tête de proue le citoyen dont la participation demeure à l'heure actuelle une arlésienne. ABSTRACT. This article presents the initial results of a study on an original participatory action research approach focusing on the articulation and the participative fabric of public policies on outdoor air quality in Montpellier, France. The approach, called Artivistes-atelier, is described, providing a dynamic map of the stakeholders involved and/or impacted and their capacity for action. The article examines this field experiment that is simultaneously reflective and analytical. These initial results allowed to interrogate through the Artivistes-atelier initiative prism the strengths and potentialities of citizen mobilization and the socioenvironlental issues democratization which is ensnared in the institutional governance. For this purpose, the article describes more widely the experimental territory with a pragmatic, reflexive and critical experience. This article is a real opportunity to build a first comparative device to be reproduce in an ADEME project in R&D, entitled Air Climate Society and Art. This project has two main aims: to decompartmentalize socio-environmental issues and to support the implementation of public policy on outdoor air quality. The results and identified limits of the Artivistes atelier device allow to examine the potentialities of the implementation of the public policies on air by all the stakeholders, starting with ...

Feedbacks from the participants to an air quality monitoring study carried out as a citizen science study inside a street canyon are reported.• A magnetic air quality index (Qmag) is proposed to improve communication between scientists within their community and between citizens, scientists, and elected officials.• Benefits and limitations of the environmental magnetism technique applied to air quality measurements are discussed.• Tips to academics for conducting this type of project, and implications on societal and political issues are documented.

<p>In the context of a double democratic and environmental crisis, participatory/collaborative action-research has multiplied in recent years with increased attention from institutions. Over the last ten years, many participatory research projects have taken up the democratic and environmental crises by proposing an emancipatory normative scheme to improve public participation and the effectiveness of environmental action.</p> <p>Our paper presents the first results of a participatory science project, BREATHE, funded by the ANR. It aims to articulate two components : (1) a participatory measurement of fine particulate matter (PM) concentration (PM 10 - PM 2.5 - PM 1 - PM 0.1) and an identification of pollution sources) from passive filters (plants and sensors) and micro-sensors subject to standardization (2) a component of accompaniment and support of public policies based.</p> <p>The project is based on a participatory science protocol (Chevalier and Buckles, 2009) based on participation engineering (Dosias-Perla et al., 2020). Our fieldwork covers three targets: (a) the incinerator (waste recovery center) - (b) a highways around a small town; (c) a street canyon, city of Montpellier, south of France. On the metrological level, the project aims at analyzing the implication and the effects of the Citizen Science device aiming at "co-constructing" at micro-scales a fine cartography of fine particles concentrations while discriminating the source and modeling the dispersion phenomena. On the political level, the project aims on the one hand to analyze the institutionalization process of the device and on the other hand to analyze its effects on the "co-production" of public policies and strategies through different regulatory frameworks (EPZ, PCAET, Mobility Plan, etc.).</p> <p>We will also discuss the limits and contributions of this type of interdisciplinary and participatory approach aiming at acting on pollution with and for society. We will present current results and first analyses concerning the complex intertwining of technical and political issues related to air quality metrology, the importance and difficulties of standardizing measurement and of truly developing metrology at relevant scale levels when it comes to supporting public action and addressing health issues</p>