Assembly Line

What are donuts made of?

Donuts take 7 things directly, among them flour, sugar, baker's yeast, eggs, water and vegetable oil. Trace them back and you pass 20 made things on the way to 19 raw materials.

How donuts are made See it on the map

What goes straight in

From the ground: 19 raw materials

Made along the way: 15 things

Metals 1

Chemicals and fuels 9

Body and health 1

Food 4

What it is packed in

On the line, but left out of everything above, because it holds the finished thing rather than goes into it.