Easy Green: Fill the grill with sustainable, humanely produced beef. Beef with the American Grassfed Association's certification is free of antibiotics and cows spend most of their lives in the pasture (as opposed to cramped Concentrated Feeding Operations). The Animal Welfare Approved label is exclusive to family farms where cows receive adequate pasture time; antibiotic use is limited to sick animals.
Uber Green: Meat is the traditional choice for summer grilling, but organic, locally grown fruits and veggies are by far the greenest option. Try a fruit kabob or a grilled portobello mushroom. Tasty imitation "meat" products are plentiful these days, so even if you're not completely vegan, like Oprah Winfrey was for 21 days, you might share her love of veggie sausages.