Telegraph: Marius Kloppers, the chief executive of BHP Billiton, warned that the Australian economy would suffer significantly if the country did not implement a carbon tax before the international community imposed one. quot;Failure to do so will place us at a competitive disadvantage in a future where carbon is priced globally,quot; he told a lunch in Sydney yesterday (THURS). Mr Kloppers said Australia, which is the largest emitter of carbon dioxide per person in the world, needed to quot;look beyond …