Former Indiana Sen. Dan Coats, the Director of the National Intelligence, testified on Capitol Hill this week about the “abrupt” threat posed by climate change.

“The impacts of the long-term trends toward a warming climate, more air pollution, biodiversity loss, and water scarcity are likely to fuel economic and social discontent—and possibly upheaval—through 2018,” according to Coats in written testimony. His office overseas 17 intelligence agencies, including the CIA and NSA.