After the success of the various health guides, both in terms of consumer comprehension and/or standardisation and/or industry uptake, it will be interesting to see just how successful the laudable aims suggested here turn out to be.

For a start I am pretty unclear even on what 'green' means, and suspect it can be often quite contradictory. Try weighing Fairtrade vs. Food Miles!

And whilst many boxes get ticked, conferences attended and even targets met, whilst any move to better informed populace is to be lauded, without consistency across the total GHG-producing delivery chain backed by serious official support, I can't see my missus wading through every pack's screed as she dashes down the aisle en route home from work. I won't, simply because, to get all currently required on, I can't read it.

And even when trialled, such as Walkers carbon rating, I doubt I'd see much planetary merit in heading from Tescos to Sainsbury's in case the crisps were a few grams lower. To this day I have no clue what 75g represented anyway.

Just hope some thought has gone into education, appreciation and persuasion as well, and how this will work with the billions pumped out on brand advertising rather than trying to fight it. That... could be a big ...waste.