Soon shipping will join the polluters of the north .
航运将很快加入到北极污染者的行列。
It is profitable for traders and incumbent polluters .
对于交易者和负有责任的排污者而言，它是有利可图的。
After years of bitter political wrangles , australia will start taxing its biggest polluters and pouring money into solar , wind and other renewable-energy sources from next july .
