I don't really want wind turbines and solar panels to cover the whole planet. I used that to calculate some numbers for canada, and we'd need about 64k average offshore wind turbines, and 3200 square kilometers of solar farms.

Canada is comprised of 9,984,670 km^2. I don't think that your 3200 km^2 is going to make that much of an impact.

It's a whole 0.5% of the area of farmland in Canada. Think of the children!