Google wants to show flyers their carbon emissions with flight options in sustainable travel push

This Wednesday, Google launched a new feature that displays a carbon emissions estimate for nearly every flight in its search results next to the price and duration of the flight.

It'll allow eco-conscious travelers to factor carbon emissions into their choice when deciding which flight to book.

These emissions estimates are flight-specific as well as seat-specific. For instance, newer aircraft generally pollute less than older aircraft, and emissions increase for premium economy and first-class seats because they take up more space and account for a larger share of total emissions, according to Richard Holden, Google's vice president of...