Este trabalho trata da narrativa de resistência que o Movimento de Pequenos Agricultores-MPA constituiu para resistir aos processos de expropriação das sementes dos camponeses, no estado de Santa Catarina, Brasil. O objetivo é analisar como o projeto de sementes do movimento influenciou a construção da soberania alimentar por meio de suas ações junto às instituições. Como instrumentos metodológicos fontes primárias e secundárias foram utilizadas, levando em consideração o referencial teórico da ecologia política, focado em conceitos de conflitos socioambientais, justiça ambiental e soberania alimentar. Assim, foi realizada pesquisa de campo, nos anos de 2015 e 2016, nos estados do Distrito Federal, Santa Catarina e Rio Grande do Sul, com diferentes atores que participaram do processo. Da análise constata-se que o movimento por meio da cooperativa Oestebio, desenvolveu a experiência de massificação de sementes crioulas e varietais a partir de uma ampla articulação de ações, alianças com instituições e outros movimentos, influenciando e sendo influenciado por políticas públicas e ações do Estado para constituir a soberania genética com base no projeto de soberania alimentar. Ao teceram uma longa teia de relações, articulando os campos político, econômico, científico e socioambiental, ancorado no diálogo constante nos diferentes níveis local, regional, nacional e internacional - constituíram uma experiência portadora da soberania alimentar dentro dos limites atuais da economia política contemporânea, expropriadora de recursos e geradora de conflitos e injustiças socioambientais. / This thesis is about the resistance narrative of Small Farmers Movement has established to resist to expropriation of peasants seeds, in the Santa Catarina state, Brazil. The goal is to analyze how the project of seed of the movement has impacted the food sovereignty throughout its actions with institutions. Primary and secondary sources were used as methodological tools taking account the political ecology approach, focusing on concepts such as socio-environmental conflicts, environmental justice and food sovereignty. A field work was conducted, in 2015 and 2016, in Distrito Federal, Santa Catarina and Rio Grande do Sul states, interviewing several actors who took part of this process. It was verified that the movement by means of Oestebio cooperative developed the experience of multliplication of native and varietals seeds throughout a broad articulation of actions, alliances with institutions and others social movements. It has influenced and has received influence of public policies and State actions to constitute genetic sovereignty based on its food sovereignty project. By weaving a long web of relations, connecting the political, economical, scientific and socio-environmental fields, based on a frequent dialogue in different levels local, regional, national and international they built an experience of food sovereignty inside current limits of the political economy, expropriator of resources and producer of socio-environmental conflicts and injustices.

Este trabalho trata da narrativa de resistência que o Movimento de Pequenos Agricultores-MPA constituiu para resistir aos processos de expropriação das sementes dos camponeses, no estado de Santa Catarina, Brasil. O objetivo é analisar como o projeto de sementes do movimento influenciou a construção da soberania alimentar por meio de suas ações junto às instituições. Como instrumentos metodológicos fontes primárias e secundárias foram utilizadas, levando em consideração o referencial teórico da ecologia política, focado em conceitos de conflitos socioambientais, justiça ambiental e soberania alimentar. Assim, foi realizada pesquisa de campo, nos anos de 2015 e 2016, nos estados do Distrito Federal, Santa Catarina e Rio Grande do Sul, com diferentes atores que participaram do processo. Da análise constata-se que o movimento por meio da cooperativa Oestebio, desenvolveu a experiência de massificação de sementes crioulas e varietais a partir de uma ampla articulação de ações, alianças com instituições e outros movimentos, influenciando e sendo influenciado por políticas públicas e ações do Estado para constituir a soberania genética com base no projeto de soberania alimentar. Ao teceram uma longa teia de relações, articulando os campos político, econômico, científico e socioambiental, ancorado no diálogo constante nos diferentes níveis local, regional, nacional e internacional - constituíram uma experiência portadora da soberania alimentar dentro dos limites atuais da economia política contemporânea, expropriadora de recursos e geradora de conflitos e injustiças socioambientais. / This thesis is about the resistance narrative of Small Farmers Movement has established to resist to expropriation of peasants seeds, in the Santa Catarina state, Brazil. The goal is to analyze how the project of seed of the movement has impacted the food sovereignty throughout its actions with institutions. Primary and secondary sources were used as methodological tools taking account the political ecology approach, focusing on concepts such as socio-environmental conflicts, environmental justice and food sovereignty. A field work was conducted, in 2015 and 2016, in Distrito Federal, Santa Catarina and Rio Grande do Sul states, interviewing several actors who took part of this process. It was verified that the movement by means of Oestebio cooperative developed the experience of multliplication of native and varietals seeds throughout a broad articulation of actions, alliances with institutions and others social movements. It has influenced and has received influence of public policies and State actions to constitute genetic sovereignty based on its food sovereignty project. By weaving a long web of relations, connecting the political, economical, scientific and socio-environmental fields, based on a frequent dialogue in different levels local, regional, national and international they built an experience of food sovereignty inside current limits of the political economy, expropriator of resources and producer of socio-environmental conflicts and injustices.

Aux États-Unis, les villes connaissent une crise urbaine qui se manifeste par l’existence de quartiers centraux détériorés, concentrant les minorités pauvres. Les quartiers de Jefferson-Mack (Detroit) et Hunts Point (South Bronx, New York) en sont des archétypes. Ils sont pourtant animés par d’importantes mobilisations civiques, se focalisant sur des questions environnementales et alimentaires. Le but de ce travail est d’évaluer le potentiel d’initiatives environnementales et alimentaires à améliorer les conditions de vie des habitants des inner cities. La première partie, en mobilisant un corpus d’études urbaines, présente ces quartiers comme les produits d’une crise urbaine structurelle. Nous mettons en évidence que les habitants y subissent une « crise urbaine de l’habiter », dans laquelle les nuisances, les pollutions et le manque d’accessibilité aux ressources environnementales et alimentaires, sont déterminants pour comprendre l’essor des mobilisations. La deuxième partie explique le rôle des mobilisations civiques environnementales et alimentaires dans ces quartiers. En nous appuyant sur les corpus de la justice environnementale et alimentaire, nous démontrons que l’hybridation des questions environnementales, alimentaires, sociales et spatiales a reconfiguré l’action collective. La troisième partie analyse les enjeux de la réappropriation du territoire, à partir du corpus des commons studies. À travers le cas de l’agriculture urbaine et d’autres pratiques établies sur des espaces vacants, nous montrons que la réappropriationdu territoire procure de multiples bénéfices. Loin d’être cantonnée aux domaines environnementaux et alimentaires, elle permet d’améliorer partiellement – mais non sans heurts – les conditions de l’habiter. / American cities are still affected by the urban crisis, patent through the existence of low-income inner city neighborhoods, concentrating the urban poor and ethnic minorities. The neighborhoods of Jefferson-Mack (Detroit) and Hunts Point (South Bronx, New York) are both considered icons of the urban crisis. Yet they witness substantial environmental and food justice activism. The purpose of this thesis is to understand how grassroots environmental and food practices can be used to improve living conditions for inner city communities. The first section analyzes how these two blighted neighborhoods are products of a structural urban crisis. By using a corpus of urban studies on urban decline, we demonstrate how the daily lives of residents reveal a “crisis of urban living” in which noxious uses and pollution as well as limited environmental and food access are key factors triggering grassroots activism. The second section is grounded in a corpus of studies on environmental and food justice, in order to explore the role of environmental and food justice activism in these neighborhoods. We defend that the hybridity between environmental, food, social and spatial issues reconfigured grassroots activism. The third section mobilizes a corpus of commons studies to analyze the challenges of reclaiming urban space. By studying the rise of urban agriculture and other environmental amenities occurring on vacant land, we explore the multiple benefits of community urban space reclamation. Beyond environmental and food benefits, and despitesome conflicting issues, reclaiming urban space allows transformative processes to noticeably yet incompletely improve living conditions.