why would you have to buy yeast on line when its available in every grocery store I have ever been in??
You cannot find a lot of natural yeast but it can be developed which is how a true sour dough bread is made..not a speedy process either.
What sort of yeast? I know that bread yeast (for baking) can come in small jars (about 4oz. /113 grams.). These jars are easily found in many grocery stores.
What?! Doesn't it occur naturally in the... just in the world? I mean, just google sourdough. (Why on earth would it be illegal?!) Or, you know, buy it at your normal shop, next to the flour.