I think of the quiet enjoyment of premises. I'm thinking of risk of fire if people want to install metal halide lights. That's an issue that would have to be closely regulated. Most people wouldn't want to live in multi-family dwellings that have a lot of cannabis smell going back and forth. There may be technological solutions to that problem. I've heard from some people that it's possible to grow cannabis without those sorts of intrusions and without the sorts of risks with respect to fire.
On September 12th, 2017. See this statement in context.