0 New packaging will indicate when food is spoiled

 Prof. Andrew Mills with food packaged in his smart plastic (Photo: University of Strathclyde) 

Given that German scientists have already developed packaging film that kills food-inhabiting bacteria, it only makes sense that Scottish scientists should be developing the next step in the process – food packaging that changes color when the food is going bad. The “intelligent plastic” film, which is being created at Glasgow’s University of Strathclyde, is intended to take the guesswork out of whether or not the food packaged within it is still safe to eat.

The new plastic is intended to be used in conjunction with modified atmosphere packaging, an existing process in which the shelf life of food is lengthened by replacing the air inside its packaging with a protective gas mixture – often, most or all of the oxygen is drawn out and replaced with nitrogen or carbon dioxide.
full story and source:http://www.gizmag.com/smart-plastic-for-food

CARBON DIOXIDE!!!...but it's dangerous!!....and it's poisonous!!....and it leaves a footprint!!....and..and
plants breath it!! ...oh.