We went to one of the world's largest cannabis business conference in the world - here's what it was like

Cannabis is a serious business.

Currently, medical marijuana is legal in 25 states, with several more considering bills. The Tax Foundation, a nonpartisan research group, estimates that it's a $45 billion industry in the US alone.

This year, the International Cannabis Association hosted the second-annual Cannabis World Congress and Business Exposition in New York City, where cannabis businesses from around the world can network, show off their products, and attend seminars and panel discussions about the burgeoning industry.

Take a look at what went down inside the three-day conference.