Follow us on Twitter where we'll announce the next topic for On The Line.

VICE News correspondent Nilo Tabrizy joined On The Line discuss the rapidly expanding legal marijuana industry.

Marijuana is America's fastest growing industry. Last year, the legal market was valued at 2.7 billion dollars. But marijuana is still illegal on the federal level, which has led to conflicting state laws, restrictive regulations, and endless problems for cash-only marijuana business owners and operators. Nilo Tabrizy traveled to Colorado and Canada for VICE News to explore the promises and perils of the bud business.

Watch "Inside America's Billion-Dollar Weed Business: The Grass is Greener"

VICE News and On The Line want to hear from you! Let us know your questions on Twitter with the hashtag #ontheline, or send us a video message on Skype.

To send us a Skype video message, follow the instructions here

Watch previous episodes of On The Line

With support from Skype.