In this Thursday, July 10, 2014, photo, Melissa Fitzgerald discusses how to prepare a cannabis-infused dipping sauce during a cooking class at the New England Grass Roots Institute in Quincy, Mass. The Washington state Liquor Control Board adopted rules to require recreational marijuana products to be labeled clearly as such; to be scored so a serving size is easy to distinguish; and to be approved by the board before sale. (Photo by Michael Dwyer/AP Photo)
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