Marijuana legalization across Canada is on the horizon, and the industry is shaping up to look different from the way it does in nine U.S. states that have legalized adult use of the drug.

Age limits, government involvement in distribution and sales, and access to banking are some big discrepancies.

And Canadians will be able to order cannabis online and have it delivered through the mail — something that's illegal in the United States.

Prime Minister Justin Trudeau announced Wednesday that marijuana will be legal nationwide on Oct. 17.

In the meantime, Canada's provinces and cities are working out issues concerning how cannabis will be regulated.