The emergence of the legalized cannabis market, combined with the spread of e-cigarettes (which can also be used to aerosolize cannabis), have changed the tobacco market. In many places the historic pattern of youth beginning with tobacco and adding cannabis has been reversed, with more youth starting with cannabis and adding tobacco. The pressure for public use of cannabis has the potential for undermining smokefree laws. Finally, major tobacco corporations, which have been considering entering the cannabis market since the 1970s, are starting to move. This research explores this new dynamic as well as the extent to which best practices from tobacco control are being applies to cannabis.