How important are genetically modified foods?

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How important are genetically modified foods?

How important are genetically modified foods?
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How important are genetically modified foods?

CBSTV Videos 2:31 mins

It's estimated that up to 75 percent of all processed foods sold in local grocery stores contain genetically modified ingredients. Some people in California are fighting for Proposition 37, which calls for labeling foods containing those GMOs. John Blackstone reports.

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