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Could smart tags alert users to their bad food?

Name: Could smart tags alert users to their bad food?
Uploaded: 2014-03-17T16:34:17-0400
Duration: 1 min 22 s
Description: Expiration dates on food items could soon be a thing of the past. Chinese scientists have invented a smart tag that alerts users when their food has gone from good to bad. CBS News' Omar Villafranca reports.

Expiration dates on food items could soon be a thing of the past. Chinese scientists have invented a smart tag that alerts users when their food has gone from good to bad. CBS News' Omar Villafranca reports.