@BowsacNoodle @VaxxSabbath @thefinn @Jewpacabra @SK1ZM @Escoffier No, straw and piss to make nitrate. Let it sit for awhile for bacteria to work on it, then strain it through wood ash, which gives the potassium. Set the wood ash aside and crystals of potassium nitrate will form as it dries (maybe wind for that??).

Mix potassium nitrate 80/20 with charcoal to make gunpowder. Make it burn better by mixing in sulfur or powdered rust at 10% to the other mixture by weight.