CBS "Face the Nation" interviews during 2015: on Environment

Bernie Sanders: Climate change will lead to international security crises

SANDERS: Well, that's what the CIA and the Department of Defense tell us. If we are going to see an increase in drought and flooding and extreme weather as a result of climate change, what that means is that peoples all over the world are going to be fighting over limited natural resources. When you have drought, when people can't grow their crops, they're going to migrate into cities. And when people migrate into cities, and they don't have jobs, there's going to be a lot more instability, a lot more unemployment. And people will be subject to the types of propaganda that al Qaeda and ISIS are using right now. I think, when we talk about all of the possible ravages of climate change, which, to my mind, is just a huge planetary crisis, increased international conflict is one of the issues that we have got to appreciate will happen.