Boston Globe: A bill before Congress would give local governments the authority to set fuel efficiency standards for taxicabs, allowing cities like Boston to overcome federal court rulings that struck down their ambitious efforts to require all taxis to be hybrids. The Green Taxis Act of 2009, part of an overall climate change bill introduced Wednesday in part by Senator John F. Kerry, would amend existing federal laws so that cities such as Boston, New York, and Seattle, which have failed in …