Morse Pitts has been cultivating the same land in New York's Hudson Valley for 30 years. His operation, Windfall Farms, is the very picture of local, sustainable agriculture. From early spring to late fall, the farm's 15 acres are luxuriant with snap peas, squash, mint, kale, and Swiss chard. Its greenhouses burst with sun gold tomatoes and an array of baby greens. Pitts, who is in his 50s and is tall with gray hair, doesn't use chemical fertilizers or pesticides or any genetically modified seeds. He cultivates biodiversity, not just vegetables.