Video: Washington State's Prop. 522 could spark national debate on GMO food labeling

A Washington state ballot initiative on genetically-modified organisms could have a ripple effect on the food industry nationwide. If passed, Proposition 522 will require certain labels on food containing GMOs in that state. As Teresa Garcia reports, the controversial measure has added up to be one of the most expensive campaigns in history.

Read the whole article on CBSNews - Science

More from CBSNews - Science