A Harvard expert challenges a new study that suggests there is little difference between eating a 300-calorie serving of french fries and a 300-calorie serving of almonds every day for a month, in terms of weight gain or other markers for diabetes risk.

Walter Willett, professor of epidemiology and nutrition at the T.H. Chan School of Public Health, takes a closer look at a diet that is as healthy for you as it is the planet,

An excerpt from “Resetting the Table: Straight Talk about the Food We Grow and Eat” by Robert Paarlberg, associate in the Sustainability Science Program at the Harvard Kennedy School and at Weatherhead Center for International Affairs.