Opinion, by Alfonso Stefanini
RIO DE JANEIRO, BRAZIL - The Jardim Botânico do Rio de Janeiro (Botanical Garden), located in the South Zone of the city, was founded in 1808 and is currently a UNESCO biosphere reserve and World Heritage site. But the Botanical Garden now has a steady flux of sewage and greywater seeping into its main river, Rio dos Macacos, and its water tributaries.
The Rio dos Macacos River traverses the length of the park and at the end of . . .