There's a charity, ALLFED, that I donate too that investigates techniques for keeping as many people alive as possible if we can't have agriculture for a few ye

There's a charity, ALLFED, that I donate too that investigates techniques for keeping as many people alive as possible if we can't have agriculture for a few years due to supervolcano or comet strike or nuclear winter. One of the promising approaches is to turn our now dead forests into calories via fungus. So it's good to see people investigating the wood chip to fungus route at an industrial scale.