Boston Globe: IF THE US Senate can`t bring itself to take bold steps to promote cleaner energy, members should at least take more basic ones. More than a year ago, the House of Representatives passed a comprehensive bill to put a price on carbon across the economy. The most ambitious measure that the Senate seems likely to approve, in contrast, is a limit on greenhouse gas emissions only from electric utilities. This is half a loaf, if that, but it`s well worth passing. Utilities produce …