In 1999, fully aware of its greater maturity as a quality company, operating in a region extremely rich in natural resources but fragile, as the Amazon region, MRN started its process towards getting ISO 14001 certification, which is proof of environmental responsibility from an economical development. This work had special characteristics in itself, as the scope of certification would cover not only the operational and administrative areas of the company but also the Residential Village.

The challenge of getting this certification was accepted and taken seriously not only by the employees but also by the community as a whole. Finally, on December 7th 2001, MRN was recommended for certification by DET NORSKE VERITAS - DNV and then received two certificates, one giving national certification, issued by Brazilian organization INMETRO, and the other on an international basis, issued by Dutch organization RVA.

The new challenge that now faces the company and its people is the upkeep and constant improvement of the Environmental Management System, as required by ISO 14001.