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Text description provided by the architects. An urbanism project, usually with poor visibility and maximum importance, the channeling and wastewater treatment system of the Integrated Socio-Environmental Program – PISA, of the Municipality of Porto Alegre – PMPA, running for more than 30 years, with wastewater treatment actions in the Guaiba estuary basin, with the participation of 40% of the territory of Rio Grande do Sul, Brazil, in addition to the obvious environmental and health benefits, returns the accessibility to the river in the capital in the short-term, with an expressive social impact.

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