I have seen the future of food transparency, and it is optical. Also, it fits in your smartphone. Imagine a scanner the size of a grain of rice, built into your phone. You go to the grocery store and point it at something you want to buy. If it's an apple, the scanner will tell you what variety it is, how much vitamin C it has and how long it has been in cold storage. If it's a fish, you'll learn whether it's really orange roughy or just tilapia being passed off as...
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