Regarding 3), maybe it's just a small exception, but in Toronto's Chinatown you can see that a lot of the houses have gardens with vegetables. It's just that th

Regarding 3), maybe it's just a small exception, but in Toronto's Chinatown you can see that a lot of the houses have gardens with vegetables. It's just that the overall lots are small and the gardens are small. But they are still there. In Vancouver, even downtown, there are a number of community gardens with various vegetables growing.