If news of states suing the EPA merely whets your appetite for vehicle-emissions news, here’s more: Firstly, a federal judge has ruled that a lawsuit from automakers seeking to prevent Rhode Island from regulating vehicle emissions can go forward. Rhode Island officials are left wondering how their situation is different from a very similar lawsuit in Vermont, which was rejected by a federal judge in September. Secondly, DaimlerChrysler paid a record $30 million fine last year for failing to meet the U.S. government’s unambitious fuel-efficiency standards. Thirdly, three German cities, including the capital Berlin, have kickstarted a program aimed at prohibiting high-polluting vehicles from their city centers. And finally, Beijing has introduced cleaner fuel standards in a further attempt to clear its air before the August Olympics. And that’s it — until there’s more.