Even national security is in the crosshairs of climate change. The U.S. military and intelligence communities have recognized climate change is a "threat multiplier." It increases competition for scarce resources, worsens conditions that cause governments to fail, and produces breeding grounds for extremism and terrorism.

"National Security and the Threat of Climate Change"
2007, CNA Corporation

"Climate Change and National Security"
2007, Council on Foreign Relations

"Global Climate Change: National Security Implications"
2008, U.S. Army War College

"National Intelligence Assessment on the National Security Implications of Global Climate Change to 2030"
2008, Deputy Director of National Intelligence for Analysis