Increasingly, the question of what we eat and how it affects our health is a subject that is important not just to those concerned about nutrition but to environmentalists. Kelly D. Brownell, a psychologist who is director of the Rudd Center for Food Policy and Obesity at Yale University, has been a leading researcher into America's obesity epidemic and its links to the practices of the food industry. Author of the 2004 book, Food Fight, Brownell has recently become interested in the connections between obesity, the environment, and hunger, believing that sustainably growing and producing more nutritious foods can help solve each of these challenges.