Weed This Week: Marijuana Usage Has Nearly Doubled Since 2013 By: Benzinga via Benzinga August 10, 2016 at 06:55 AM EDT A Gallup poll published Monday shows the percentage of U.S. adults who declare smoking marijuana almost doubled since 2013. Thirteen ... Read More >> Related Stocks: Altria Group Philip Morris International Reynolds American Scotts Miracle-Gro Company