Reuters: California on Friday forecast high costs for the most ambitious clean energy plan in the nation, including a 28 percent rise in electricity rates and $115 billion in construction if the state wants to get a third of its electricity from renewable sources by 2020. And even so, it might not hit the goal. The Public Utilities Commission in a draft report nails down the most populous U.S. state’s price of going green at a time of economic turmoil and as Congress considers federal …