As Canada made history yesterday, becoming the first G7 nation in the world to legalize recreational cannabis, the demand for legal marijuana is likely to see an intense shift throughout North America. The upcoming U.S. mid-term elections will be including cannabis as a topic of discussion. Four states are considering legalizing cannabis and if all 4 states vote green, pot would be legal for recreational use in 11 states and D.C., and 33 states for medicinal purposes.Significant attention has been placed on what’s next for the cannabis industry across the continent. In Canada alone, recreational cannabis could generate annual revenues higher than $8 billion by 2020, according to the Cannabis Business Plan. For investors that are weary of a pure-play positions in cannabis stocks, there are companies that hold positions in traditional industries while also working to expand their business to include a stake within the hot cannabis industry.Are You Watching These 3 Stocks Making Moves In The Marijuana Space?