Reuters: Australia cannot fence itself off from the world carbon-trading market, a leading industry expert said, despite signs it may attempt to do just that in order to keep costs down for local greenhouse-gas polluters. Australia, which will require polluters to buy carbon emission permits from 2010 in an effort to combat climate change, has hinted it will limit links between its own market and offshore markets for at least the regime’s first few years. “You do not want to create …