Stalker watched in amazement as the news reporter followed the life of the Walkers potato crisp, from ploughing to packet, from planting to pub snack.
The TV piece was about the carbon footprint that is generated by every packet of crisps produced - 75 grams of carbon dioxide - the greenhouse gas - for every packet.
The figure can now be found on the back of every packet of Walkers crisps. It was an extraordinary insight into the production of the humble potato crisp, seeing how they come out of the soil and into the foil.
The analysts kept remarking that beef and diary were really top offenders when it came to greenhouse gases.
Perhaps some consumers might heed that and head towards the mushrooms instead if the meat? This is obviously the way that things are going.
It will be interesting to see which mushroom company becomes the first to carbon audit their produce and produce the exact number of grams of greenhouse gases produced in the production thereof.
It would be really interesting to see this done - but Stalker is not so sure that the final number will be a comforting one for the industry.
Maybe some boffin out there is already working on the carbon footprint of the humble 'shroom - if so, Stalker would love to hear from them.
Meanwhile it's just a guessing game - and anyone's guess is better than Stalker's.