For about a year now, Google Maps has had the option to serve you an to your destination. If you’re making long trips, it’s a nice little benefit — saving you a bit of extra fuel on your trip. Now, having proven itself here, the feature is .

The app update is coming to Google Maps users in , including the UK, France, Spain, and Poland. It even brings with it a new feature, something the U.S. hadn’t had: Options to select your vehicle’s fuel source, so the routing can optimize based on powertrain.

Of course, one first wonders what “eco-friendly” means in an app built around . Does it take you through as many subways as possible before a rental car, or does it tell you to ditch the crossover and take a train? How does the environment really factor in?

For Google, “eco-friendly” means fuel efficient, and that means highways. In terms of fuel efficiency, they’re as good as roads get — no stop lights, no wildly varying speed limits. Just cruise control and the open road.

But, there’s a difference between “eco-friendly” and fuel-efficient. Google’s new routing is certainly the latter, saving end-users money at the pump, but it may miss out on the former. We’ve known the for decades, and we know them to be severe — negatively impacting .

So, yes, Google’s “green” routing will help drivers spew fewer hydrocarbons across the European skies. But, to be truly eco-friendly, the company may be barking up the wrong tree.