Shanna Farrell loves a good drink. As a bartender, she not only poured spirits, but learned their stories--who made them and how. Living in San Francisco, surrounded by farm-to-table restaurants and high-end bars, she wondered why the eco-consciousness devoted to food didn't extend to drinks. The short answer is that we don't think of spirits as food. But whether it's rum, brandy, whiskey, or tequila, drinks are distilled from the same crops...