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mofongo wrote (edited )

The original Brazilian story is from August 2016 and it says the meeting was going to take place in September, so it's very likely that the negotiations are finished.

Edit: I search for more recent news and I found that there have been fracking operations in the region, at least in Argentina and Uruguay, in search for oil. There was also a reported oil and chemical spill recently that may have affected the underground reserve.

Source: http://concordiadirecto.com/acuifero-guarani-petrolera-oculto-derrame-de-quimicos-en-la-region.html

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