In 2006, CNA brought together 11 recently retired three and four-star generals and admirals to form a Military Advisory Board (MAB), with the goal of examining the national security implications of climate change. Over the last five years, the CNA MAB has published three reports on the nexus of energy, climate, and national security. In this report the MAB focuses on the national security implications associated with shifting the U.S. transportation sector to alternative fuels.
The free flow of oil is critical to world commerce and global economic prosperity. Oil trade requires the use of maritime trade routes, which can span from hundreds to thousands of miles. Hence, oil tankers often travel through straits and canals to reduce transport costs. These passageways—referred to as chokepoints—are narrow channels along the most widely used global sea routes. This study evaluates how potential disruptions at critical chokepoints could affect the U.S. economy and economies around the world.