AAP: Malcolm Turnbull’s new focus on greenhouse gas reduction policy is simply a diversion from internal problems in the opposition, Climate Change Minister Penny Wong says. The opposition leader – who has been fending off renewed speculation about the ambitions of Peter Costello – has seized on the government’s emissions trading scheme (ETS) policy, flagging a Senate inquiry to replace the one the government axed last week. But on Monday Liberal MPs were unwilling to define their …