The Environmental Protection Agency and Transportation Department announced new vehicle labels May 25 that indicate fuel efficiency and tailpipe greenhouse gas emissions. The new labels are updates from those currently in use and include label designs for cars that use alternative fuel or energy sources as well as for cars that use traditional gasoline. Specifically, the labels, which will be voluntary in 2012 and mandated in 2013, provide information including estimated annual fuel costs, savings, and information on each vehicle’s environmental impact.