What would be the economic impact of legalizing marijuana?

Some are obvious, but when my hubby and I were discussing it we came up with some interesting “down the line” benefits like the bood to the agriculturial industry. I was wondering what your thoughts are positive and negatively on how legalization would effect the current economic situation.
By the way, I don’t smoke pot, nor would I if it were legal. Been there done that many moons ago.