It seems like common logic that a bottle of zinfandel from New Zealand would have a larger carbon footprint than a syrah from California. But a study by National Geographic found that the wine coming from Down Under is actually 25 percent more efficient than the domestic wine. What gives? Turns out foreign wines that are shipped through boats (rather than in trucks for domestic wines) have a lower carbon footprint. Wine lovers on the West Coast should enjoy vino from California and Australia; those on the East Coast should say cheers to wine from Europe, South America and anything made right in their own backyard.