Bloomberg: Australia’s carbon price may be more than double the earlier estimated level as pressure builds on the government to set stricter targets for emissions reductions, Citigroup Inc. said. Carbon may be priced at about A$50 ($47) a metric ton through the planned emissions trading system, rather than about A$20, Citigroup said in a March 4 report. BlueScope Steel Ltd., Iluka Resources Ltd. and AGL Energy Ltd. are among the companies that may be the most affected by higher prices, it said. …