A congressional commission assembled to look into the incident blamed both the company and regulators, and called for civil and criminal investigations to continue.
norsk hydro Mining News
China this year has been exporting unusually high volumes of alumina, a substance used to make aluminium.
Figure is fivefold increase from August, up 3,400% y/y
The first spot transaction sees 3,000 tonnes of alumina change hands at $437.23 a tonne.
Norsk Hydro said on Tuesday it has won permits from Brazilian authorities to restart operations at half capacity at its Alunorte alumina refinery.
Norsk Hydro has won permits from Brazilian authorities to restart half the capacity of its Alunorte, the world's largest alumina refinery.
Hydro plans to halt production and lay off 4,700 people at Alunorte, which has been operating at half capacity since March due to an environmental dispute.
Hydro was ordered to slash output by half at Alunorte after the company admitted to making unlicensed emissions of untreated water during severe rains.