> faster Scanning a QR code from a screen is faster than from a piece of paper? How does that work? > smarter A smart person would carry both a digital and p

> faster Scanning a QR code from a screen is faster than from a piece of paper? How does that work? > smarter A smart person would carry both a digital and paper copy of their travel documents. > greener Ah, yes, all it takes to make flying "green" is eliminating a single sheet of A4 paper per passenger.