And soda of course would get a carbon credit because carbonation takes CO2 out of circulation... until the soda drinker burps.
The industry would want to avoid labelling. That's not because they want to hide anything but because it is almost impossible to do accurately which opens them up to litigation (class action of people who think they've been misled) or silly rule fiddling to gain competitive advantage.
Worse still, you'll get green washers who use carbon offsetting to tell you that they have a zero carbon product, thus making a complete joke of the exercise.
Peter raises an interesting thing in disposal. If a plastic bottle gets recycled then it is zero carbon. If it gets burnt as fuel then it releases carbon (but could be offset against other fuels). If it just gets dumped as garbage then it is a carbon sink (ie. negative carbon). Frankly, I'd rather have the bottle burned up and released into the atmosphere for reabsorbtion than dumped in the ocean.
Organic labelling or fat labelling etc are straight forward when compared to environmental labelling.
Far better is to educate people that various classes of product have various pros and cons.
Written in February 2009