San Francisco Chronicle: Both John McCain and Barack Obama have grand plans for America’s energy future that include weaning us off imported oil, boosting renewable power, filling the freeways with plug-in hybrid cars and cutting greenhouse gas emissions. Whether either one will be able to afford those plans as president is another matter. “There’s a financial crisis going on, and that’s going to determine a lot of what they can do,” said William Hogan, professor of energy policy at Harvard …