Name three other unusual sources of food people are resorting to eating.

From the text:

Uri came with food sometimes. A jar of molasses, a turnip. When he brought chewing gum, we chewed the sugar out of it, then swallowed it whole.

Resting on an upturned crate or school desk would be the shank of a horse or a side of dog or cat, a box of salt, a licorice stick, an onion, a potato or two.