Age: MALCOLM Turnbull has hardened his stance against the Government’s emissions trading scheme, vowing to oppose it in Parliament and arguing for a delay until at least 2012. Addressing the Liberal federal council meeting in Sydney, Mr Turnbull also moved to shore up his position as Opposition Leader following bad poll results and ongoing speculation about the career aspirations of former treasurer Peter Costello. In taking a tougher line, Mr Turnbull is picking up on Liberal and …