Still carrying a paper boarding pass when you travel? Air Berlin's got a new way to go green this Earth Day. The airline's iOS app now sports Pebble integration, letting you display boarding passes and flight information on your smartwatch. You can pull up the QR code-style pass on your wrist when it's time to board -- the agent will be able to confirm your seat and flight info as soon as you scan, eliminating the need to pull out your phone as you queue up at the gate. Air Berlin is the second airline to offer this feature -- Vueling teamed up with Sony to add boarding pass functionality to the SmartWatch 2 just last month -- and we can only hope US carriers will follow suit.