Marijuana: 0

[Geoffrey S]

Hash would also be legal then it's in the same category, and all the smuggling and behind it, really legalising and taxing it is too tricky.

Plenty of places in the US where it could be produced. As for Europe, Morocco is already a major exporter - but in the Rif mountains, it is completely dominated by crime cartels. Legalization would break those and quite possibly be an advantage to the actual farmers in the region. In other words, for best results a coordinated effort with the Moroccan government would be worthwhile - we'd probably get it cheaper, and Morocco would actually make money of the deal.