Agriculture occupies more of Earth’s surface than any other human activity. What is the purpose of agricultural lands? Although most people might agree that the purpose of agriculture is to feed people, that’s not typically how we define agricultural productivity. Emily Cassidy will present the results of a study she and colleagues recently published redefining agricultural productivity from the conventional “stuff produced per area” (tons per hectare or bushels per acre) to number of people fed. Emily will discuss how small changes in diets can feed more people and reduce the environmental impact of agriculture.