New York’s Rep. Elise Stefanik co-led a letter signed by over 100 members of Congress—eleven Republicans, including Reps. Carlos Curbelo, Ryan Costello and Ileana Ros-Lehtinen—to President Donald Trump asking him to recognize climate change as a national security threat.

“We have heard from scientists, military leaders and civilian personnel who believe that climate change is indeed a direct threat to America’s national security and to the stability of the world at large,” the lawmakers wrote. “As global temperatures become more volatile, sea levels rise, and landscapes change, our military installations and our communities are increasingly at risk of devastation. It is imperative that the United States addresses this growing geopolitical threat,” the letter read.

The President’s National Security Strategy, released in December, failed to list climate change as a risk.