Bloomberg: BP Plc’s Australia unit said it reduced greenhouse gases by 3.4 percent last business year from a year earlier when pollution was boosted by refinery maintenance work and increased retailing sites. Emissions fell to the equivalent of 1.74 million metric tons of carbon dioxide in the year ended June 30, from 1.8 million a year earlier, BP Australia said in its 2007-08 sustainability report released today. Water consumption and emissions of sulfur oxides rose in the 2007 calendar year, …