How green is your FedEx?

Somebody wanted to FedEx a file to me today rather than email it to me even though it was only 8Mb and wasn't the most important document on the planet. I couldn't help but wonder how many files like this actually get sent via FedEx, UPS or DHL. I am guessing the number is quite large. Now in many cases it is because people want an original signed copy. My bank in the UK is big on this. I can converse with them via email quite happily but as soon as I want to transfer some money between the UK and the US I have to send a letter. What makes that all the more crazy is that today they emailed me to say they'd received my letter but could I just email them back to confirm what I'd just written to them about... All this bureaucracy must be doing a huge amount of damage to the environment. I wonder how many flights and truck journeys could be saved if a secure, digital transfer mechanism could be agreed that even small businesses and consumers could use so that orginals didn't need to be sent? Of course I can't see the likes of FedEx lobbying the government for such a thing as they'll lose business so maybe it's the sort of thing the likes of Google and other Internet giants should take up as a sign of their good citizenship.