Over the past 20 years America has been steadily marching toward a diet that is more drenched in fossil fuel than any key nutrient. Experts estimate that it now takes roughly 7 to 10 calories of fossil fuel energy to bring one calorie of food energy to the American plate. Not only have our eating habits turned us into an increasingly overweight society, but the alarming truth is that our food choices are having as much of an impact on the planet as...