The marijuana industry could be bigger than the NFL by 2020

A report out from Greenwave Advisors, a "comprehensive research and financial analysis for the emerging legalized marijuana industry," projects that legal cannabis could be an industry with revenues of $35 billion by 2020 if marijuana is legalized at the federal level. They note that this is a floor representing revenues in the first year of countrywide legalization.

It's worth noting that there's a fair degree of uncertainty surrounding these numbers - current estimates place the size of the U.S. black market at anywhere from 10 to 120 billion dollars. Predicting future marijuana sales may be a fool's errand, as evidenced by Colorado's difficulties in projecting marijuana tax revenues earlier this year.