Given Shad is now growing veg on his chicken plot

, this seems relevant as another way in which individuals can make a difference:
"You will get about two and a half kilos of seed from a 20-foot-long bed of 30 kale plants. Now that's actually three-quarters of a million seeds - and if every one of those was given away or swapped, and then grown, you will have created more than 500,000 kilograms of kale! More than enough to feed all your friends and neighbours, and their families.
So you can see that even one person, on a small scale, can make a real contribution to local food security. Take your spare seed to a local seed swap... Get together with your friends or family and set up a seed-circle: one person can grow kale seed, another parsnips, another cucumber, etc. You'll all have bags of seed - you can all just swap with each other, so no-one has to save seed from more than a couple of things, yet you all get seed of everything.
It will save you a fortune, and you'll get great, locally adapted varieties. Just remember, all this is only possible because you are growing real, open-pollinated seed. You can't do this with hybrid (F1) varieties. Funny how the seed companies are so keen on selling you hybrid seed, isn't it?"
That's copied from a local seed swap here,
https://www.incredibleseedlibrary.com/drying-your-seeds