A leavening agent is an organism or substance that when added to a dough[?] of flour and water causes it to "rise" by evolving carbon dioxide or other gasses that become trapped as bubbles[?] within the dough.
... 158 households out of which 38.0% have children under the age of 18 living with them, 48.7% are married couples living together, 20.9% have a female householder with no ...