Environmental Finance: Significant policy changes will be needed before carbon capture and storage (CCS) projects can be developed in most US states, according to Richard Cowart, director of the Regulator Assistance Project (RAP), a non-profit that advises electricity sector regulators. At a conference in London on CCS regulation and financing in the US, Lewes Gilles, chief executive of Hydrogen Energy outlined how the firm is hoping to build a 390MW hydrogen-powered plant in Kern County, California, which …