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Might be cheap in monitary terms but... not sure it's as energy efficient. What's the environmental impact?

Ocean freight is extremely energy efficient isn't it? Much cheaper than overland trucking for the same distance and weight?

This argument falls apart once you realize that the meat is taken to and from the ships via trucks and rail.

Money is energy. You hire an American and he consumes twice as much energy, and produces twice as much emissions, compared to a Chinese.