Australian: JULIA Gillard refused today to commit to a tax on carbon despite public pressure from BHP Billiton chief executive Marius Kloppers. The Prime Minister said the government would assess the options in “good faith’ through the climate change committee. “I think the rule in, rule out games are a little bit silly,’ Ms Gillard said this morning. “Obviously many members of the business community, Mr Kloppers included, have made statements and have called over quite a long …