article January 31, 2020 How the US military churns out more greenhouse gas emissions than entire countries How the U.S. Military Churns Out More Greenhouse Gas Emissions Than Entire Countries The Pentagon is the world’s biggest consumer of fossil fuels—and agent of climate change. By Luke Darby September 13, 2019 USAf/Getty Images He’s right. A recent Department of Defense report found that climate change “will affect the Department of Defense’s ability to defend the nation and poses immediate risks to U.S. national security.” READ MORE