More power companies call for credits trading

Power companies in Australia and the US have gone public in favour of carbon trading systems. The Australian Gas Light Co., the nation's largest energy retailer, which also owns power plants, said the States' proposed trading system is "positive'' because it gives an incentive to curb emissions, says Managing Director Paul Anthony. Origin Energy set the pace for support by its membership of the Business Roundtable on Climate Change which has also called for regulation. The two biggest power companies in the US, Duke Energy Corp. and Exelon Corp., have called for federal regulation of carbon emissions to help guide power-plant development, reports the international Bloomberg news service. Power plants emit 39% of all greenhouse gases in the US.