Flying Binghi - the link I posted has the quotes from the company where they state, and I quote from the article here:
a Hydro spokesman told Climate Spectator that while the carbon tax “is one of a number of factors that will add cost in the future”, it is “not a significant factor” in its decision to push toward a curtailment of operations. “We are currently losing $6-7 million dollars per month (cash) – that is before the carbon tax has come into effect,” the spokesman confirmed.