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Nélio S. Machado, researcher, teacher and writer​

  “SUSTAINABILITY    =    PRESERVATION + TECHNOLOGY”

https://www.clubedeautores.com.br/book/130849--Condominios_Horizontais_Sustentaveis?topic=animais#.WSWd2GgrKM9

'Have you ever done your part to keep the planet healthy for the next generation?'
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