LA Times: Reporting from Washington – The Senate’s environment committee is set to take up an energy and climate-change bill that features a 20% cut in U.S. greenhouse gas emissions by 2020, a target that is stricter than legislation passed by the House this summer, according to an 801-page draft of the bill. The measure, to be unveiled Wednesday, is co-sponsored by Sen. Barbara Boxer (D-Calif.) and Sen. John F. Kerry (D-Mass.). It will serve as the starting point for what promises to be a …