I'm trying to be as generous as possible here. I think what you're saying is that only eating local in Canada would be inefficient, compared to importing/export

I'm trying to be as generous as possible here. I think what you're saying is that only eating local in Canada would be inefficient, compared to importing/exporting. And you're right, to a certain extent. We wouldn't have oranges or avocados, unless they were grown inefficiently. We would have to change our diets. The point you're missing though, I think, is that pretty much any region that had a significant population before industrialization is able to grow and eat a reasonably well-balanced diet locally. Would I miss avocados and oranges? Definitely. Would it mean that I'd be incapable of eating a nutritious diet? Absolutely not. > What do you eat the rest of the year? Well, lots of vegetables will last a long time in a "cold room". This is an uninsulated room in the basement that usually hovers just above freezing point. Meat can be frozen, or preserved, or butchered as needed. Grains and legumes keep a long time (wheat, lentils, peas, etc). Dairy farms run all-year-round. Around here, many people produce significantly more fruit than they could eat before it spoils; the solution is generally to freeze it or can it. At my house, we keep the deep freeze outside, so keeping frozen food is pretty much zero cost for a significant portion of the year. I dunno dude, while my diet would be a little less interesting, eating entirely local would be quite plausible in the Canadian prairies. There's things I'd miss, but it wouldn't be nutrients. [...but you can pry avocados out of my cold dead hands]