The marijuana industry is undergoing major changes, from legalization to shortages to innovation. In this week's episode of CannaBiz, Keith Merker, CEO of WeedMD, talks about expanding in the midst of a Canadian post-legalization supply issue. Sandra and Nicole Elkind of STO Responsible explain how they created sustainable, eco-friendly packaging for cannabis users. And Cheddar's J.D. Durkin traveled to Detroit for a look at a dispensary open for business.