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Jocemar Silveira, 39 anos, ex-catador de material reciclável da zona sul de São Paulo, desenvolveu dois inventos que facilitam a sua vida e a vida da comunidade: um "redigestor", aparelho que transforma o resíduo orgânico da própria casa de Jocemar em metano, que é utilizado para abastecer a casa. O outro invento é uma prensa hidráulica, que ajuda a compactar o material reciclável coletado pelos catadores.

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