By the way, watch out for tankies from hexbear moving forward. They just federated with sjw, and I wouldn't be surprised if they gravitated towards ncd.
Over fishing, pollution and changing climate have rendered strömming, the fish used to make surströmming, increasingly rare. This year it's been selling for hundreds of euros per can in some places. Gunpowder would be the cheaper option
Indeed, Strömming / Hering has become rare. However, for warfare, Surströmming could also be replaced by some fermented organic waste to achieve he same effect.