Bread unpredictable since the steam is not produced until the bread is baked. Steam leavening happens regardless of the raising agents (baking soda, yeast, baking powder, sour dough, beaten egg white) included in the mix. The leavening agent either contains air bubbles or generates carbon dioxide. The heat vaporises the water from the inner surface of the bubbles within the dough. The steam expands and makes the bread rise. This is the main factor in the rising of bread once it has been put in the oven. CO generation, on its own, is too small to account for the rise. Heat
Tunisian bread riots Tunisian bread riots The Tunisian bread riots (, ) were a series of violent demonstrations in Tunisia that occurred from December 1983 to January 1984, triggered by a rise in the price of bread due to an IMF-imposed austerity program. President Habib Bourguiba declared a state of emergency and the riots were put down by force. Over 100 rioters were killed. The regime was weakened by the upheavals and their aftermath. Three years later General Zine El Abidine Ben Ali seized power in a coup. The European economy in 1983 had been stagnant for some years. This had affected Tunisia