Here's how to make an effective and inexpensive yeast substitute.
1. Add all ingredients according to the recipe.
2. Then, add in equal parts baking soda and lemon juice to equal the amount of yeast called for in the recipe last.
3. Bake as usual.
Should any calamity befall you or your family that changes your situation to one of survival, do you know what to do, where to go, how to get there, what to do once you get there, how to provide for yourself and loved ones or what you will need and how much? Most lack the forethought to plan ahead and prepare themselves for any likelihood other then a flat tire, and even then only because the automobile factory placed it in the vehicle for them. Feel free to read, experiment and improvise what I have put on this site to potentially help you one day.