[2][3]Magda Renner began her work in environmental conservation with the co-founding of the "Ação Democrática Feminina Gaúcha" (ADFG) in 1964, with fellow environmentalist Giselda Castro.
[4][5] After attending a conference titled "The four basic principles of ecology" by environmentalist José Lutzenberger at the Association of Agronomists in 1972, Renner was further inspired to engage in environmental causes.
[10] In the 1980s, she held Protests on the problems arising from the installation of the Triunfo Petrochemical Complex, which ended up helping the group of companies to become a model of environmental responsibility.
[11] In 2012 the Legislative assembly of Rio Grande do Sul, on the initiative of Congresswoman Marisa Formolo, created the "Hilda Zimmermann, Giselda Castro and Magda Renner Ecology Pioneers Award" which highlights actions in defense of the environment.
[14] Her trajectory and that of Giselda Castro, were narrated in the documentary Substantivo Feminino, by journalist Daniela Sallet, with testimonies from Brazilian activists and foreigners.