Col. Dan Nolan suggests that CO2 will cause a lack of food and clean water, which will cause populations to migrate, which will be a harbinger of war

Nolan: Time for Congress to Address Climate Change : Roll Call Opinion

A consensus of national security and military leaders recognize climate change as a threat to our national security. As the Department of Defense reported, climate change will “act as an accelerant of instability or conflict, placing a burden on civilian institutions and militaries around the world.” Rising coastlines will create refugee crises in some of the world’s poorest countries. More frequent and extreme weather events, like the devastating flood in Pakistan in 2010 or Hurricane Sandy last year, will drain budgets and cost lives. Resource scarcity will spark conflict and raze fragile states across the globe. A lack of food and clean water will cause populations to migrate, and that is a harbinger of war.