Re: shipping it around
"Unfortunately the re-usable bags have a much larger carbon footprint than the 'single use' bags (about 150 times greater) while the 'single use' bags usually get re-purposed, thusavoiding the need for buying other plastic bags for the secondary purpose."
You do raise an interesting point there, but I suppose it all boils down to individuals. I have almost no need to re-use single use carrier bags and the shopping bags we use are now coming up to 3 years old and still going strong. In my case, I'd say we already broke even on the carbon footprint and are now in debit.