“Climate change is an important issue that can be addressed by all three elements of the national security equation: defense, diplomacy, and development,” says Kent Butts, in this short expert analysis from the Environmental Change and Security Program. Kent Butts, professor of political-military strategy at the Center for Strategic Leadership, U.S. Army War College, makes the case for considering global climate change a nontraditional threat to security and discusses how the U.S. military is reacting to a changing climate.