A handful of the world's biggest banks are starting to look at the risk that climate change poses to their businesses, but investors say they need to do more. Necessary measures for the banks include raising targets to reduce greenhouse gas emissions at companies in their portfolios, according to Ceres... Ceres...found a number of banks, including Royal Bank of Canada and Wells Fargo, are formally calculating the risk they take when lending money to companies that could be affected by carbon dioxide regulations... Of the banks surveyed, HSBC..., ABN AMRO..., Barclays PLC, HBOS PLC, Deutsche Bank AG, Citigroup and Bank of America ranked the highest in their approaches to climate change... Bear Stearns Co was rock bottom. Legg Mason and Franklin Resources Inc ranked among the lowest. Bear Stearns was not immediately available for comment. Franklin Resources [Franklin Templeton] and Legg Mason separately said they were reviewing the study. [also refers to Goldman Sachs, Merrill Lynch, Royal Bank of Scotland]