Financial Times: Calpers, the California public employees pension fund, has called for US corporations to improve their reporting of the business risks posed by climate change-related water-scarcity. Anne Stausboll, the recently-appointed chief executive of Calpers, on Thursday welcomed a new report that calls on companies to measure their water “footprint” in the way that some are now meauring their greenhouse gas impact, and to take steps to address and measure potential risks. “Some …