On Tuesday, Eric told you about some recent developments in vehicle technologies. One change that you'll soon see when you shop for vehicles is new fuel economy labels. The new versions of the labels include estimated annual fuel costs, savings, and information on the vehicle's environmental impact. And these labels aren't just for gasoline-powered vehicles; plug-in hybrids and electric vehicles also will have this information. The labels will also provide an estimate how much fuel or electricity it takes to drive 100 miles.

The labels will be required for all vehicles starting with model year 2013, but you may start seeing them earlier on some model year 2012 vehicles. Be sure to check out the labels for more information on what they'll include.

What efficiency information do you look for when you buy a vehicle?

Each Thursday, you have the chance to share your thoughts on a question about energy efficiency or renewable energy for consumers. Please comment with your answers, and also feel free to respond to other comments.