[A] Chinese-run nickel mine [being developed by the Chinese Government-owned Metallurgical Group Corporation] in Papua New Guinea has been accused of ill-treating local workers and is being threatened with closure. The Ramu nickel mine in Madang province could contaminate rivers and devastate fish stocks, scientists have warned...PNG's Labour Department has demanded that Metallurgical Group Corporation and its subsidiary, ENFI, raise wages and provide a proper canteen, better toilets and insurance for employees...An ENFI manager said the company would act swiftly to allay the Government's concerns.