Main content
![](https://ichef.bbci.co.uk/images/ic/640x360/p018z5s8.jpg)
Food packaged in strange atmospheres
Jem shows how different gases are used to redden meat, keep salad fresh and control the ripening of fruit.
Duration:
This clip is from
More clips from Episode 5
-
How do you hold an apple in suspense?
Duration: 04:43
More clips from Bang Goes the Theory
-
The Standby Task Force—Series 8, Disaster Relief
Duration: 01:41
-
Leaves on the track—Series 8, Trains
Duration: 02:13