![](http://grist.org/wp-content/uploads/2008/11/nyc-hybrid-taxi_180.jpg)
New York City cab drivers will not be forced to go green, as a federal judge on Friday smacked down a municipal plan to make all new taxis achieve at least 30 miles per gallon by 2012. U.S. District Judge Paul Crotty ruled that fuel-economy standards should be up to the feds, not cities.