There's also nothing wrong with choosing to support local farmers for economic and environmental reasons.
While I don't know what the "environmental reasons" might be, I certainly support local Farmers where I can. You would think shipping costs would knock the New Zealand product right out of the market but it doesn't. Every Spring I buy at least one whole lamb, cut and wrapped, from a local farmer so I know the local farmers can be competitive. I support our farmers but I'm damned if I'll subsidise them. I leave that to our government....;-)