413 Bio fuels
This exhibit demonstrates how far a car can drive wiht a certain amount of a certina bio fuel. To the right of the pump is a basket with a couple of different bio products: seed, wood chips, and pellets. On the table is a country landscape and a car on a road.
The visitor fills the pump with either bio mass. Then she/he tanks the car and pushes a start button. The car drives on the road until the fuel is consumed.
The visitor is free to compare with another bio mass fuel.