Linked to carbon foot print should be carbon trading.
I am more cynical about this. If major companies can get away with murder on real share trading and fiddling the books think how much they can get away with on carbon trading where nothing actually exists.
Had to buy a phone charger a couple of weeks ago and I was offered a carbon neutral one. I did ask how this worked...apparently I could make an extra payment to some organisation and it will offset what I bought...no one in the shop could tell me where the cash was going.